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COMPLETE Cam Kits

10% off all Cam Kits PLUS $75 off the GPI Camshaft!

LS3

Cam Kits

GPI – LS3 Cam Kit for 5th Gen Camaro SS / C6 Corvette

Varies Based on Options

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L99

Cam Kits

GPI – L99 Cam Kit for 2010-2015 Chevrolet Camaro SS

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LT1

Cam Kits

GPI – LT1 Cam Kit for 6th Gen Camaro SS / C7 Corvette

Varies Based on Options

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3 Bolt

Cam Kits

GPI – Cam Install Package (GM Low Lift LS Camshaft 4.8L / 5.3L / 6.0L)

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L83 (5.3L)

Cam Kits

GPI – L83 Cam Kit for 2014-2019 Silverado & Sierra 5.3L

Varies Based on Options

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L99 to LS3

Cam Kits

GPI – L99 to LS3 Conversion Cam Kit for 2010-2015 Chevrolet Camaro SS

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Camshafts

Save $75 OFF all GPI Camshafts!

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Camshafts & Valvetrain

GPI – L99 VVT Cam

$425.00 $350.00

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Camshafts & Valvetrain

GPI – LS3 / LS2 / LS1 Cam

$324.00 – $374.00

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Camshafts

GPI – LT1 Cam (Gen 5)

$425.00 $350.00

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Camshafts

GPI – Low Lift LS Camshaft (4.8L / 5.3L / 6.0L / 6.2L)

$324.00 – $374.00

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Camshafts

GPI – Low Lift VVT LS Truck Camshaft L92 / L94 / L9H (6.2L)

$425.00 $350.00

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Camshafts

GPI – LT4 Blower Cam (Gen 5)

$425.00 $350.00

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Cylinder Heads

Save up to $300 on GPI Cylinder Heads!

LT1 / LT4 / L86

Cylinder Heads

GPI – Ported OEM LT1 / LT4 / L86 (Gen V) Cylinder Head Package

From: $1,295.00 $995.00

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LS3 / L92 / L99 / LSA

Cylinder Heads

GPI – Ported LS3 / L92 / L99 / LSA Cylinder Head Package

From: $1,295.00 $995.00

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LS1 / LS2

Cylinder Heads

GPI – Ported OEM LS1 / LS2 Cathedral Port Cylinder Head Package

From: $1,295.00 $995.00

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L83

Cylinder Heads

GPI – Ported OEM L83 (Gen V 5.3 DI) Cylinder Head Package

From: $1,295.00 $995.00

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LS7

Cylinder Heads

GPI – Ported OEM LS7 Cylinder Heads

$2,095.00 $1,857.50

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Cylinder Heads

GPI – Ported CID LT1 / LT4 Cylinder Head Package

$3,162.99 $3,004.84

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Piston & Rod Combos

Save $150 off GPI’s Piston/Rod Combos!

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Piston Rod Combos

GPI – Complete Gen 5 LT1 / LT2 / L86 Drop-In Piston / Connecting Rod Package (2014+ Corvette / 2016+ Camaro SS)

$1,694.90 $1,538.91

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Piston Rod Combos

GPI – Complete Gen 5 L83 5.3L Drop-In Piston / Connecting Rod Package (14-19 Silverado / Sierra / Tahoe / Yukon)

$1,694.90 $1,538.91

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Piston Rod Combos

GPI – Track Attack LS3 High Compression Dome Piston and Rods Package (5th Gen Camaro / C6 Corvette)

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Piston Rod Combos

GPI – Complete 4.070″ Bore Gen 5 LT1 / L86 Piston / Connecting Rod Package (2014+ Corvette / 2016+ Camaro SS)

$1,694.90 $1,566.11

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Porting Services

Save $50 OFF all GPI Porting Services!

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Induction

GPI – LS3 / L76 Intake Manifold Mod (Radius Rod Mod or Port Mod)

$225.00 – $725.00

Available to order

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Intake Manifolds

OEM L86 (6.2L) Intake Manifold and Throttle Body Swap for L83 (5.3L) Trucks (2014-Up GM Truck)

$350.00 $332.50

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Induction

MSD – Atomic AirForce LT1 Intake Manifold PORTING SERVICE ONLY

$300.00 $250.00

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Induction

GPI – Factory Gen V LT1 Intake Manifold PORTING SERVICE ONLY

$275.00 $225.00

In Stock

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Induction

GPI – L86 Intake Manifold PORTING SERVICE ONLY

$400.00 $350.00

In Stock

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Intake Manifolds

Chevrolet Performance – LT2 Intake Manifold Package (12697714)

$258.95 $246.00

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Converters

Take up to $100 OFF Circle D Converters!

Sale!

Converters

Circle D – 6L80/90 High Performance Converter

$569.05 – $930.05

Available to order

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Converters

Circle D – 6L80/90 Pro Series Single Disk Converter

$979.00 $919.00

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Converters

Circle D – 6L80/90 Pro Series Multi Disk Converter

$1,299.00 $1,199.00

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Converters

CircleD – 8L90 Pro Series Multi Disk Converter

$1,299.00 $1,199.00

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Converters

Circle D – 4L80E Pro Series Converter

$979.00 $919.00

Available to order

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Converters

Circle D – GM HP Series 10L90 Torque Converter

$1,999.00 $1,899.05

Available to order

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Remote Tuning Services

Save 15% off all GPI Tuning Services!

Sale!

Tuning Services

GPI – Remote Tune Calibration Package (Requires HP Tuners / EFI Live)

$425.00 $361.25

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Tuning Services

GPI – Remote Tune Calibration Package (Includes HP Tuners Hardware)

From: $724.99 $646.24

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Tuning Services

GPI – Remote Tune Updates for Additional Mods

$100.00 $85.00

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Contact US

Have a question about the next step of your build, a product, the status of an order, or anything else?  Here is the place to ask!  I’ll funnel your question to the correct team.

Contact Form

Thank you for contacting us!

Your message have been received.  We will message you back as soon as we have the first free moment!

Questions? Ask Us!

GWATNEY PERFORMANCE AND AFFIRM


Affirm and Gwatney Performance have teamed up to offer easy financing for orders over $500 – without a catch. There are no gimmicks like deferred interest or hidden fees, so the total you see at checkout is always what you’ll actually pay.

CHOOSE 3, 6, OR 12 MONTHLY PAYMENTS


Affirm designed its loans to offer you flexibility and control over your budget. Affirm offers rates from as low as 10-30% APR based on your credit. Actual rates will be shown at checkout.

REAL PEOPLE, REAL SUPPORT


Affirm has a dedicated team in San Francisco at Affirm HQ, ready to answer your questions and help out however they can.


FREQUENTLY ASKED QUESTIONS

 

WHAT IS REQUIRED TO HAVE AN AFFIRM ACCOUNT?

 

  1. Be 18 years or older (19 years or older in Alabama or if you’re a ward of the state in Nebraska).
  2. Provide a valid U.S. or APO/FPO/DPO home address. Buy with Affirm is not currently available to West Virginia residents.
  3. Provide a valid U.S. mobile or VoIP number and agree to receive SMS texts. The phone account must be registered in your name.
  4. Provide your full name, email address, date of birth, and the last 4 digits of your social security number to help us verify your identity.



DO I HAVE A CREDIT LIMIT WITH AFFIRM?


Unlike a credit card, Affirm is not a revolving line of credit. While customers can take out multiple Affirm loans at once, each Affirm loan application is evaluated separately as a closed-end transaction. An application from a returning customer may be denied, however, if that customer has failed to repay other Affirm loans on time or if the customer shows excessive borrowing behavior.

HOW DO I PAY MY BILLS?


You can pay your Affirm bills online at www.affirm.com/pay. They accept payment by debit card, bank transfer and check.

DOES AFFIRM PERFORM A CREDIT CHECK?


Yes, when you first create an Affirm account, Affirm perform a ‘soft’ credit check to help verify your identity and determine your eligibility for financing. This ‘soft’ credit check will not affect your credit score.

WHY WAS I PROMPTED TO PAY A DOWN PAYMENT WITH A DEBIT CARD?


Affirms tries hard to approve every purchase but sometimes can’t approve the full amount. When this happens, Affirm provides a debit card down payment option so that you may still complete your purchase right away.

WHY WAS I PROMPTED FOR A CHECKING ACCOUNT?


Affirm sometimes requires additional information to consider a credit application. Such information may include an active checking account, which helps Affirm verify your identity and your ability to repay the requested loan. If they prompt you for this information but you are unable to provide it, Affirm will be unable to approve your credit application.


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