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Written by Wednesday, 26 June 2013 16:35

AJPE offers superior quality repairs for all AJPE Cylinder Heads & AJPE Billet Blocks.

Please contact Roger Schiffer for Cylinder Head Repairs,


Mark Meza for Block Repairs.

Company Policies

Written by Monday, 24 June 2013 21:27

Terms of Sale:

We accept the following payment methods for customers without a revolving account at AJPE:

  • Money Orders
  • Credit Cards: Visa, MasterCard, American Express
  • Debit Cards with a Visa or MasterCard logo
  • C.O.D: Cashiers / Certified Checks
  • Bank Wires (fee applies): Please note this form of payment may delay shipment of your order.

All custom orders require a 50% prepaid deposit.

Payment must be made in full prior to shipment (except for C.O.D. shipments).

Company checks are accepted for customers with a revolving account. Bank and Service charges will be assessed on all returned checks. Customers that have NSF checks will be placed on prepaid credit card payment terms.

Customers with open invoices aged over 45 days will be placed on a No-Ship status until payment is made to bring account balance current.



Non-refundable sales tax will be charged on all invoices to customers in California who do not have a signed resale card on file with us at the time of invoicing.


Freight and Shipping:

All shipping is F.O.B Santa Maria, California.

Shipping methods include UPS Air & Ground Service, UPS Freight, and Conway Freight.

Customer is responsible for indicating shipping preference and address prior to shipment.

We do NOT have regular Fed Ex service and therefore discourage this shipping method as it could result in a delay.

We also do NOT have USPS Parcel delivery service, and AJPE will NOT ship or recieve any packages shipped via USPS.

Every effort will be made to accommodate your shipping preference within reason.

3rd Party or Freight Collect shipments are not available except for special circumstances and only with prior approval. Such shipments will incur a handling fee.

Shipping to AJPE: Always contact AJPE for specific shipping instructions prior to shipping anything to AJPE.

Racetrack shipments: Shipments to racetracks may incur a substantial NHRA track delivery fee. No C.O.D. service available to any racetrack.

Drop Shipment orders must be prepaid in full or a revolving account established with AJPE prior to shipment.


International Shipments:

Orders that are shipped to countries outside of the U.S. may be subject to import taxes, customs duties and fees levied by the destination country ("Import Fees").

The recipient of an international shipment may be subject to such Import Fees, which are levied once a shipment reaches your country.

Any additional charges for customs clearance must be borne by the recipient; we have no control over these charges and cannot predict what they may be.

Customs policies vary widely from country to country; contact your local customs office for further information.

When customs clearance procedures are required, it can cause delays beyond our original delivery estimates.

International shipments may incur SED charges if applicable.


Return Policy:

No Refunds!

Credit or exchange may be issued upon receipt of item(s) in original box in "New Condition" to AJPE within 30 days of invoice date

Please provide invoice number and reason for return with item(s) being returned.

A 15% Restock Fee may apply. 

Special Orders or Custom Orders are NOT returnable or refundable.

Custom orders or Projects will require a 50% secured deposit prior to work beginning. 

Merchandise sent in to AJPE for referbishing or re-fitting will be held no longer than 120 days. Merchandise in AJPE possession after 120 days will become the property of AJPE Inc. 


Privacy Policy

Written by Monday, 10 June 2013 23:32


This privacy policy sets out how "Alan Johnson Performance Engineering " uses and protects any information that you give "Alan Johnson Performance Engineering" when you use this website.

"Alan Johnson Performance Engineering " is committed to ensuring that your privacy is protected. Should we ask you to provide certain information by which you can be identified when using this website, then you can be assured that it will only be used in accordance with this privacy statement.

"Alan Johnson Performance Engineering " may change this policy from time to time by updating this page. You should check this page from time to time to ensure that you are happy with any changes. This policy is effective from February 2, 2009.

We may collect the following information:

  • name and job title
  • contact information including email address
  • demographic information such as postcode, preferences and interests
  • other information relevant to customer surveys and/or offers

What we do with the information we gather:

We require this information to understand your needs and provide you with a better service, and in particular for the following reasons:

  • Internal record keeping.
  • We may use the information to improve our products and services.
  • We may periodically send promotional emails about new products, special offers or other information which we think you may find interesting using the email address which you have provided.
  • From time to time, we may also use your information to contact you for market research purposes. We may contact you by email, phone, fax or mail. We may use the information to customize the website according to your interests.

Information Security.

We are committed to ensuring that your information is secure. In order to prevent unauthorized access or disclosure we have put in place suitable physical, electronic and managerial procedures to safeguard and secure the information we collect online.

How we use cookies:

A cookie is a small file which asks permission to be placed on your computer's hard drive. Once you agree, the file is added and the cookie helps analyze web traffic or lets you know when you visit a particular site. Cookies allow web applications to respond to you as an individual. The web application can tailor its operations to your needs, likes and dislikes by gathering and remembering information about your preferences.

We use traffic log cookies to identify which pages are being used. This helps us analyze data about webpage traffic and improve our website in order to tailor it to customer needs. We only use this information for statistical analysis purposes and then the data is removed from the system.

Overall, cookies help us provide you with a better website, by enabling us to monitor which pages you find useful and which you do not. A cookie in no way gives us access to your computer or any information about you, other than the data you choose to share with us.

You can choose to accept or decline cookies. Most web browsers automatically accept cookies, but you can usually modify your browser setting to decline cookies if you prefer. This may prevent you from taking full advantage of the website.

Links to other websites.

Our website may contain links to other websites of interest. However, once you have used these links to leave our site, you should note that we do not have any control over that other website. Therefore, we cannot be responsible for the protection and privacy of any information which you provide whilst visiting such sites and such sites are not governed by this privacy statement. You should exercise caution and look at the privacy statement applicable to the website in question.

Controlling your personal information.

You may choose to restrict the collection or use of your personal information in the following ways:

  • whenever you are asked to fill in a form on the website, look for the box that you can click to indicate that you do not want the information to be used by anybody for direct marketing purposes
  • if you have previously agreed to us using your personal information for direct marketing purposes, you may change your mind at any time by writing to or emailing us at This email address is being protected from spambots. You need JavaScript enabled to view it.

We will not sell, distribute or lease your personal information to third parties unless we have your permission or are required by law. We may use your personal information to send you promotional information about third parties which we think you may find interesting if you tell us that you wish this to happen.

If you believe that any information we are holding on you is incorrect or incomplete, please write to or email us as soon as possible, at the above address. We will promptly correct any information found to be incorrect.

Terms of Use

Written by Monday, 10 June 2013 23:27

Welcome to our website. If you continue to browse and use this website you are agreeing to comply with and be bound by the following terms and conditions of use, which together with our privacy policy govern Alan Johnson Performance Engineering relationship with you in relation to this website.

The term "Alan Johnson Performance Engineering " or "us" or "we" refers to the owner of the website whose registered office is:

1097 Foxen Canyon Road
Santa Maria CA 93454

The term "you" refers to the user or viewer of our website.

The use of this website is subject to the following terms of use:

  • The content of the pages of this website is for your general information and use only. It is subject to change without notice.
  • Neither we nor any third parties provide any warranty or guarantee as to the accuracy, timeliness, performance, completeness or suitability of the information and materials found or offered on this website for any particular purpose. You acknowledge that such information and materials may contain inaccuracies or errors and we expressly exclude liability for any such inaccuracies or errors to the fullest extent permitted by law.
  • Your use of any information or materials on this website is entirely at your own risk, for which we shall not be liable. It shall be your own responsibility to ensure that any products, services or information available through this website meet your specific requirements.
  • This website contains material which is owned by or licensed to us. This material includes, but is not limited to, the design, layout, look, appearance and graphics. Reproduction is prohibited other than in accordance with the copyright notice, which forms part of these terms and conditions.
  • All trademarks reproduced in this website which are not the property of, or licensed to, the operator are acknowledged on the website.
  • Unauthorized use of this website may give rise to a claim for damages and/or be a criminal offence.
  • From time to time this website may also include links to other websites. These links are provided for your convenience to provide further information. They do not signify that we endorse the website(s). We have no responsibility for the content of the linked website(s).
  • You may not create a link to this website from another website or document without Alan Johnson Performance Engineering's prior written consent.
  • Your use of this website and any dispute arising out of such use of the website is subject to the laws of the United States of America.

Blaine Johnson

Written by Monday, 03 June 2013 20:24

Coming soon...


Written by Wednesday, 22 May 2013 20:57

What credit cards do you accept?
AJPE accepts VISA, Mastercard and AMERICAN Express.

By what other means can I pay my bill?
We also accept checks and can arrange a COD. Please discuss options with your sales representative. Please visit our policies section.

Can I apply for credit?
If you would like to be considered for a credit line at AJPE we can fax or e-mail you a credit application. Once the completed application is received, AJPE will review all information and make a decision, usually within ten (10) days.

Can I have my parts shipped to an address other than my billing address?
Yes. Please provide this information to your sales representative. Drop Shipments are available for prepaid or open accounts only.

What is your return policy?
Please contact your sales representative for approval, and visit our policies section.

How do I get a copy of an invoice or balance due on an account?
Please contact the This email address is being protected from spambots. You need JavaScript enabled to view it. .

How late can I order products to be shipped the same day?
In most instances, parts that are in stock can be shipped same day if the order is received and processed by 3 pm PST. Exceptions include International and Fed Ex Shipments which may take longer to process.

About Us

Written by Wednesday, 22 May 2013 20:57

The story of AJPE begins in Santa Maria California, a small farm town in Central California.


     Alan Johnson and his brother Blaine grew up on their Johnson Family dairy farm. Their days were spent tending to dairy cattle, moving irrigation pipe, and doing their daily chores before and after school. Both boys learned early on they could fix or build things that they didn’t have access to or couldn’t afford. Influenced by their Dad’s involvement in the local Drag Racing scene in and around the Santa Maria valley during 1950’s they both discovered the thrill of speeding around the farm on just about anything they could conjure up that had wheels and would burn gas.

     Alan and Blaine began their racing efforts competing in area Sand Drags with their home built Dragster powered by a Blown Alcohol Big Block Chevy. They proved themselves to be fierce competitors throughout the Central California region during the early to mid-eighties while honing their engine design talents, driving, and fabrication skills.

     In 1985, the Johnson Family started Johnson Racing which has since evolved into AJPE. Alan designed the 1st solid Billet cylinder head for the DRCE Oldsmobile engine platform which required the purchase of their first CNC machine. With Alan’s ability to design supercharged engines and his capacity to tune a racecar along with Blaine’s driving ability they began their dominance of the NHRA Top Alcohol Dragster category winning 26 National Events and 4 consecutive National Championships from 1990 thru 1993. Their on track performance and race wins spurred interest in their engine program and resulted in many engine and parts sales for AJPE.
1994 brought several changes to Johnson Racing and AJPE. Alan and Blaine moved up to NHRA’s professional class of Top Fuel and AJPE purchased their first 5-Axis CNC machine, which allowed them to eliminate the inconsistencies of hand porting while keeping up with the volume of hemi heads needed to campaign a competitive Top Fuel Dragster. By now AJPE was supplying several teams with Stage 1 Top Fuel heads along with a full scale repair department to service damaged cylinder heads.

     On August 31st, 1996 we lost Blaine Johnson in a tragic racing accident that changed us all on many levels. Some lost a Son, some a brother, a friend, a competitor, or a co-worker. Regardless, the loss of Blaine was by far the biggest test to the Johnson family’s determination and desire to continue racing in honor of Blaine and what he believed in. Never a quitter and always pushing to improve helped both the racing program and AJPE shift to another level.

     1997 brought in Winston as a primary sponsor for the family dragster and a new Top Fuel head design from AJPE. With Alan’s refined tune up and Gary Scelzi behind the wheel, Johnson Racing began an era of dominance winning 3 World Championships between 1997 and 2001 all while developing and testing new products from AJPE. During this time Alan created the AJPE 481X engine platform. The 481X was the final evolution of Alan and Blaine’s famed Oldsmobile power plant. It started with a clean slate and was designed around three basic fundamentals: The ability to produce power, maintain its durability, and ease of maintenance. These primary features propelled the 481X to the top of the Chevrolet wedge style engine package.

     During 1999 AJPE added two new CNC machines to their manufacturing facility and broke ground on an additional 15,000 sq. ft. shop for future expansion. By the end of 2004, Alan and his AJPE team designed, tested, and christened nine different types of high level racing cylinder heads. Our cylinder heads and blocks were sought after worldwide with new customers throughout the US, South America, and Europe ordering engine parts on a regular basis.

1998 – AJPE 12°, 18°, & 21° water jacket Sprint Car heads and IHRA Pro-Stock heads.
2000 – NHRA Pro-Stock head, Billet Small Block head.
2002 – AJPE Nostalgia 392 Billet head
2003 – AJPE Stage 5 Top Fuel head
2004 – AJPE Billet Big Block Chevy heads

     AJPE introduced three versions of the Stage 1 Muscle Head line of Alcohol Hemi cylinder heads early in 2005. These heads were designed for Blown Alcohol Dragster & Funny Car, NHRA and IHRA Pro-Modified, and a unique concept to the naturally aspirated injected Nitro combination. The AJPE A-Fuel head used a port design that was very unorthodox at the time but set the stage for some very impressive ET slips for our early customers. This same design is used by many NHRA A-Fuel race teams and to this day is the cylinder head of choice of NHRA Top Alcohol Champion Tom Conway.

     June 2005 brought the acquisition of Rodeck Aluminum Blocks and four more CNC machines to the fleet. AJPE and Johnson Racing had been using and selling Rodeck blocks for many years so with the announcement of John Rodeck’s retirement, it was a perfect match to bring the Rodeck manufacturing facility here to Santa Maria.

     2006 was the year of the Stage 6 Top Fuel Cylinder head. It was Alan’s partial re-design focusing on durability and safety of the Nitro Hemi Head. The valve cover rail was raised to allow for an internal fuel rail to eliminate oil leaks, and a new exhaust flange angle and bolt pattern to improve header life and seal to the head.

     The AJPE Stage 2 Muscle Head debuted in early 2007. An improved port design, raised valve cover rail, and weight reduction were its strong points. These were available with 2.400/2.450 x 1.900 valve sizes. Primary designs are for Blown alcohol Dragster and Funny Car or Pro-Modified.

     The AJPE 5.300 bore space Hemi Engine and the Stage 3 Muscle Head all came to life in 2010 and 2011. The 5.3 Hemi spent a year on the design screen and ran the full 2011 season in ADRL’s Pro-Extreme Pro-Modified class. While it didn’t light the world on fire it did prove that AJPE had the ability to create, manufacture, and test, an entirely new engine package within a 12 month period without any major setbacks. Mid 2010 saw the first results of the Stage 3 Muscle Head running on a customer’s engine being tested on Fred Mandolini’s dyno cell in Villa Park, Illinois. As designed…the Stage 3 Muscle Head worked well with screw superchargers.

     In 2012 Alan and AJPE created, built, and tested the Stage 7 Top Fuel Cylinder head for both NHRA Top Fuel classes. A late 2011 NHRA rule change allowed for a larger intake valve which brought with it a substantial increase in power noted by several teams after initial testing. AJPE purchased a second Mazak 5-Axis Machining center for the block department to increase production capacity and versatility.

     During 2013 AJPE designed and introduced the Stage 3 481X cylinder head with Eric Dillard & Steve Petty at Proline Racing Engines. The guys at Proline are Leaders in the Turbo Pro-Modified classes, setting track records in all corners of the country and abroad. 2013 also brought the addition of the new AJPE Lightweight Hemi block for the alcohol classes. With a total re-design and utilizing the new Mazak 5-Axis machine center, AJPE was able to reduce the block weight by 15 pounds over previous versions.

     2015 has brought another Mazak CNC machine to the AJPE block department and is beginning to show its potential. AJPE is in its second year of sponsoring Mike and Doug Gordon’s Morro Bay Cabinets Alcohol Funny Car in NHRA. They are running the new AJPE developed lightweight hemi block and Stage 3 Muscle Head engine combination. Currently AJPE is in the design stage of two more cylinder head packages that will be like no other…


Written by Wednesday, 22 May 2013 20:56

Tech Info

Written by Wednesday, 22 May 2013 20:56


Stg VII Top Fuel Cyl Head Tech Info

Stg VII TF C-H Valve & Seat Info 


Stg VI Top Fuel Cyl Head Tech Info

 Stg VI TF C-H Valve & Seat Info 


Muscle Head Hemi Stg IV Cylinder Head Tech Info

 M-H Hemi Torque Specs All 9/16 Studs


Muscle Head Hemi Stg III Cylinder Head Tech Info

 M-H Hemi Torque Specs All 9/16 Studs


Muscle Head Hemi Stg II  Cylinder Head Tech Info

 M-H Hemi Torque Specs All 9/16 Studs


Muscle Head Hemi Stg I Cylinder Head Tech Info

Stg I M-H C-H Valve & Seat Info 

M-H Hemi Torque Specs All 9/16 Studs



Nost 426 Hemi Cyl Head Tech Info

 Nost 426 TF C-H Valve & Seat Info 



TFX Light Block Tech Info

 H-11 Main & Head Stud Warning




TFX 2002 Block Tech Info

 H-11 Main & Head Stud Warning




 TFX 2000 Block Tech Info

 H-11 Main & Head Stud Warning



TFX 96 Block Tech Info

 H-11 Main & Head Stud Warning



TFX 92 Block Tech Info

 H-11 Main & Head Stud Warning



 481-X Stg I+II Cyl Head Tech Info

 AJPE 481-X Head Torque Sequence



481-X Stg III Cyl Head Tech Info

 AJPE 481-X Head Torque Sequence



481-X Billet Block Tech Info

H-11 Main & Head Stud Warning



 AJPE 481-X Head Torque Sequence



392 Hemi Cylinder Head Tech Info


5300 Hemi Block & Cylinder Head Tech Info

H-11 Main & Head Stud Warning

 AJPE 5.300 V‐8 "Hemi" Head Torque Sequence


5.3 Semi-Hemi Block & Cylinder Head Tech Info

H-11 Main & Head Stud Warning



SBC Billet Cylinder Head Tech Info



BBC Billet Cylinder Head Tech Info


AJ Olds Cylinder Head Tech Info




Written by Wednesday, 22 May 2013 20:55

AJPE Pricing 7-20-18

Prices are updated bi yearly and are subject to changes without notice.