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Gaskets and Seals

Prevent fluid and air leaks from diminishing your engines performance or damaging your high performance HEMI. Upgraded gaskets are essential for tasks such as engine rebuilds, and for engines that will be under extreme environments. A2Speed recommends upgrading to Cometic head gaskets in many cases, such as if your planning to add forced induction to your engine.   
 

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2003-08 5.7 HEMI Cometic Streetpro Bottom End Gasket Kit
2003-08 5.7 HEMI Cometic Streetpro Bottom End Gasket Kit
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$114.39
SKU:COM-PRO1022B
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2003-08 5.7 HEMI Cometic Streetpro Top End Gasket Kit
2003-08 5.7 HEMI Cometic Streetpro Top End Gasket Kit
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$321.57
SKU:COM-PRO1022T
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2004-2008 5.7L HEMI Engines Cometic Head Gasket - Left Side (3.95 Bore/0.040 Thickness)
2004-2008 5.7L HEMI Engines Cometic Head Gasket - Left Side (3.95 Bore/0.040 Thickness)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5468-040
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2004-2008 5.7L HEMI Engines Cometic Head Gasket Right Side (3.95 Bore/0.040 Thickness)
2004-2008 5.7L HEMI Engines Cometic Head Gasket Right Side (3.95 Bore/0.040 Thickness)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5467-040
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2006-10 6.1 HEM Cometic Streetpro Bottom End Gasket Kit
2006-10 6.1 HEM Cometic Streetpro Bottom End Gasket Kit
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$130.27
SKU:COM-PRO1023B
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2006-10 6.1 HEMI Cometic Streetpro Top End Gasket Kit
2006-10 6.1 HEMI Cometic Streetpro Top End Gasket Kit
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$321.57
SKU:COM-PRO1023T
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4.055" Cometic 6.1L HEMI MLS Head Gasket for Sleeved Aluminum Blocks (QTY 1)
4.055" Cometic 6.1L HEMI MLS Head Gasket for Sleeved Aluminum Blocks (QTY 1)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5525-040
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4.100" Cometic 6.1L HEMI MLS Head Gasket (QTY 1)
4.100" Cometic 6.1L HEMI MLS Head Gasket (QTY 1)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5876-040
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4.120" Cometic 6.4L HEMI MLS Head Gasket Set For 6.4L Drop In Pistons (QTY 2)
4.120" Cometic 6.4L HEMI MLS Head Gasket Set For 6.4L Drop In Pistons (QTY 2)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$178.95
SKU:COM-C5026-C5027-051
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4.125" Cometic 6.1L HEMI MLS Head Gasket for Aluminum Sleeved Block (QTY 1)
4.125" Cometic 6.1L HEMI MLS Head Gasket for Aluminum Sleeved Block (QTY 1)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5526-040
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4.185" Cometic 6.1L HEMI MLS Head Gasket for Aluminum Sleeved Block (QTY 1)
4.185" Cometic 6.1L HEMI MLS Head Gasket for Aluminum Sleeved Block (QTY 1)
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$85.83
SKU:COM-C5527-040
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6.1L Intake Gasket by Cometic
6.1L Intake Gasket by Cometic
Why Cometic?Cometic combines advanced materials with the most current manufacturing processes to provide custom-tailored solutions to... 
Price:$31.61
SKU:COM-C5197
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MOPAR 03-08 5.7L HEMI "Square Port" Exhaust Manifold (Header) Gasket Set 53013943AA-44AA
MOPAR 03-08 5.7L HEMI "Square Port" Exhaust Manifold (Header) Gasket Set 53013943AA-44AA
MOPAR 03-08 5.7L HEMI "Square Port" Exhaust Manifold (Header) Gasket SetDo you have a header leak or are you installing aftermarket... 
Price:$34.95
SKU:53013943AA-44AA
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MOPAR 5.7L Intake Manifold Gasket (Sold as Each) 53032382AB
MOPAR 5.7L Intake Manifold Gasket (Sold as Each) 53032382AB
MOPAR 5.7L Intake Manifold Gasket (Sold as Each)MOPAR 5.7L intake manifold gaskets. 8 required for a complete new set. For a complete... 
Price:$8.95
SKU:MPR-53032382AB
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Mopar 6.1L Crank Seal (5.7L/6.1L/6.4L HEMI Engines) 53021585AD
Mopar 6.1L Crank Seal (5.7L/6.1L/6.4L HEMI Engines) 53021585AD
Mopar 6.1L Crank Seal (5.7L/6.1L/6.4L HEMI Engines) If you develop a leaking crank seal, then the obvious solution will be to replace... 
Price:$16.95
SKU:MPR-53021585AD
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MOPAR 6.1L Intake Valve Seal 5037798AA
MOPAR 6.1L Intake Valve Seal 5037798AA
MOPAR 6.1L Intake Valve SealGenuine MOPAR OEM part. OEM Intake Valve Seal 
Price:$7.95
SKU:MPR-5037798AA
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Mopar 6.1L Water Pump Gasket (5.7L/6.1L HEMI Engines) 4792922AA
Mopar 6.1L Water Pump Gasket (5.7L/6.1L HEMI Engines) 4792922AA
Mopar 6.1L Water Pump Gasket (5.7L/6.1L HEMI Engines)Genuine MOPAR water pump gasket for 5.7/6.1L Applications 
Price:$11.95
SKU:MPR-4792922AA
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HEMI Performance Parts

A2Speed has every HEMI upgrade you could imagine. Search through a catalog of our favorite performance upgrades for each engine platform.

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HEMI Supercharger

Superchargers are the most cost-effective way of adding horsepower to a modern HEMI engine. We carry many different brands and types of superchargers.

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HEMI Crate Engines

HEMI crate engines are a great addition to any “Resto Mod” project. We can find a way to HEMI swap just about any vehicle!

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The Home for Ray Barton Racing Engines built GEN III HEMI’s

A2Speed is now providing the HEMI community with the best of the best in regards to engine building companies. Our motors are found in some of the highest horse power GEN III HEMI’s around the country, and are proven to work, and work reliably.

About A2Speed
Quality Products and Services
  • About Us
  • What We Do
  • How We Do It
  • Our Quality
A2Speed is an employee owned automotive performance parts company, specializing in the Gen III HEMI engine and the cars & trucks it powers. Just like you we are Hemi enthusiasts, and like you we are only interested in proven performance solutions. Good enough isn’t. People who invest in performance modifications want parts that last decades, not years. The effort is only valuable if the result is better than good enough, and frankly these days that’s hard to do.

A2Speed’s GEN III HEMI Background

Many of us at A2Speed have been working on the Gen III since its inception. As a team we are immersed in the Hemi world. We own, drive, modify, race and occasionally…break them. We use this experience to create SOLUTIONS, not just parts. Automotive engineering has advanced such that it is often difficult to improve on the work done by the OEMs. Difficult, not impossible. Utilizing advanced 3D modeling, CFD and stress simulations coupled with rapid prototyping, allow for the development of specialized parts that would be impractical at OEM volumes. Solutions validated with real world testing. Craftsmen level quality; and because we don’t have the layered overhead, our prices are often at or below the OEM price.

Advanced Aerospace Grade Machining

Production manufacturing is performed by partner companies that have proven track records for quality and timely deliveries. We look for certifications such as ISO-9001 and AS-9100 along with ITAR and GIDEP registrations. Several of the companies we work with regularly supply major aerospace firms and the DOD. Why use outside machining services? So that you get a better part at a better price. By utilizing only the machine cycles we need, and leveraging the superior skills and years of experience, A2Speed can give you exceptional quality at truly affordable prices.

Our company is guided by a set of core values and beliefs


  • We know that we are a community, not a “market”.
  • We recognize that we serve this community at the pleasure of its members.
  • We understand the passions, challenges and rewards that drive the enthusiast.
  • We believe that function drives form, improved performance improves appearance.
  • We know that one company can’t do it all, therefore we value partnerships.

How This Applies to Our Customers


  • We never settle for anything less than perfection.
  • All of our parts are put under intense testing before being released to you
  • You can feel secure because we use both our closest partners and our own cars to test A2Speed’s products
  • Finally we know that just having a great product isn’t enough, thus we strive to offer superior customer service, and the lowest prices. Giving you the best experience possible from start to finish.
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Our Featured Partners
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