Remote Tuning for LS & LT Engines: Step by Step Guide Building a LS or LT powered vehicle and need tuning? From bolt ons, camshaft & cylinder head upgrades, to big forced induction builds – tuning is a critical step throughout this entire process. It determines both how well the vehicle performs, drivability, and potentially […]
We get a lot of questions about intake manifolds, and because our recommendations vary depending on use and application – we thought it would be helpful to conduct a series of tests which demonstrate the several available intake manifolds back to back on the same engine. We hope these results will help our customers better […]
We had such a great weekend at CamaroFest last weekend with all of our friends and customers – it was almost hard to come back to the normal grind! Thank goodness we love what we do! We headed down to Bowling Green on Thursday 7/11/19, to get our trailer and product set up for all […]
Mike Pestka made Gwatney Performance Innovation proud this weekend at Street Car Invasion / Speedy’s Newport Dragstrip. Here is a highlight reel in case you missed it! Keep an eye out for some seriously sketchy passes by Mike Pestka and Matt Almond. They put on a great show for all!
Ben was able to make some substantial improvements to his personal best time in his GPI SS4 NFC powered LS3, but was it enough? It’s hard to believe just 12 months ago this same cam only (non-GPI cam that is…) car was running 12.4’s. Check out some footage of his runs at Super Chevy! https://youtu.be/1H8r3SDDxe4 […]
Had a great weekend at the Super Chevy Show. Brandon T. Hill II was able to rip off a 9.69@139.49mph in his 2017 Camaro SS. The track was underwater when we got there and the crew at Memphis International Raceway busted their butts and got it coming around by end of day. While we couldn’t […]
Thanks Jeff for trusting us with your gorgeous 2008 Corvette Z06. This round of mods included: GPI LS7 Custom Grind Camshaft (242/260 .630/.630 113+4) GPI LS7 Cylinder Heads Harland Sharp Roller Rockers Lingenfelter LS7 Oil Tank Expansion Callaway Honker Intake System Kooks Long Tube Headers GPI Tall (Blue) Valve Covers GPI Duno Tuning With a […]
Rob Powell 2018 Points Champion Daniel Hughes Sportsman of the Year Daniel Hughes Rookie of the Year 2018 was another exciting season for Southern Outlaw Late Model Series. We love supporting motorsport events and helping our friends win races all over the country. For those who couldn’t make it, here is a roundup from the […]
It seems a lot of questions, concerns, information and misinformation exists related to the LS7 valvetrain issues. We felt it might be helpful to our dealers and customers to summarize what we have learned over time about these issues. (Want to skip straight to our Ported OEM LS7 Cylinder Head Package?) THE INFAMOUS CONCERN I […]
Check out this video of Ben Weishaar yesterday – in his “Cam Only” LS3 powered FLOP GEN – running our new SS4 (No Flycut) Camshaft! Can he run a 9 w/ stock heads?! https://www.youtube.com/watch?v=w9yZey7FNQs Update 4/15/19: She’s a little faster now… Want to get a GPI SS4 (No Flytcut) camshaft too?
LT’s are the new LS’s! The performance truck market continues to grow at a staggering rate – with huge popularity going back to the early LS trucks. The L83 (5.3L) and L86 (6.2L) performance potential is especially promising due to these modern generation LT engines offering so much more power and technology than its predecessor […]
We are very excited to introduce our new Track Tuned Program! Our Track Tuned Program was born out of our passion for racing, and our desire to push our customers cars to the absolute limits. We break records when you break records. We win when you win. Racing is all about having the competitive edge, […]
After having the record taken away from us a couple of weeks ago, we headed back to Memphis International to attempt to regain the record! Best pass of the day was 9.25 @ 144mph – the new SBE NA LS3 Record. Setup on Ryan’s 2010 Camaro: SBE NA LS3 GPI Ported Heads GPI Custom Spec’d […]
At the Ultima Mile May 2018 event, Arkansas own – Cale Hopkins – set the Standing Mile Event Record at 223mph. This is what happened when he attempted to break his own record at the October 2018 event… C6 Z06 Build: LSX Cast Iron Block Callies Crank & Rods Diamond Pistons Procharger F1X (25psi) Brodix […]
Ryan Stevens working some magic on a 2017 Camaro SS (A8) w/ Procharger F1A (@16psi) on the dyno. This car is fitted w/ the full assortment of GPI Gen5 LT goodies including: GPI LT Drop In Pistons & Rods GPI LT Cylinder Heads GPI LT Camshaft (SS1) G1Pro Sheet Metal Intake Manifold w/ GPI […]
Want to go for a ride in this insane 620hp off road buggy? Check out the Dirt Riot Series point leading White Motorsports buggy – packing a GPI built 416ci LS3 – topped with our GPI MAX Performance LS7 Head and Cam package. Learn More about our MAX Performance LS7 Head and Cam Package […]
Rooster Booster 2.0 is BACK! It’s been a while since GPI’s Mike Pestka has taken his car out to Memphis International Raceway – but it is back – and stronger than ever! He is out hunting for 5’s, but does the new setup have what it takes?? Setup: 383ci LS Single 75mm Borg Warner Turbo […]
GPI’s Ryan Stevens is at it again! He already holds the current 5th Gen Camaro NA Stock Bottom End 1/4 Mile Record – but he is back at the track attempting to raise the bar! Can it be done? Setup: SBE NA LS3 GPI Ported Heads GPI Custom Spec’d Low Lash Solid Cam CID intake FTI […]
October 20-21, 2018 Event Register Now! Upcoming Event: Location: Blytheville Gosnell Regional Airport 4701 Memorial Dr Blytheville, AR 72315 Event Date / Time: October 20th, 2018 7am – 7pm October 21st, 2018 7am – 1pm Want more information? Ready to push your car to the limit in a standing mile race? Visit ultimamile.com to register for the […]
This Kit Uses: PLEASE NOTE: This kit can be installed prior to tuning, but in order to take full advantage using ethanol-based fuel you will need HP Tuners or EFILive tuning software and access to a dyno / competent tuner. Once the kit has been installed and the engine has been calibrated, the ECM will take […]
We’ve been fans of Joe Gibbs Racing’s DRIVEN Synthetic Oils for years. They have what believe is the highest quality & best value synthetic oil in the business, and most importantly – it is what we use on all new engines and shop builds. If you want the oil Gwatney Performance uses and recommendeds – check […]
Ready for some CamaroFest 8 highlights?! Kicking it off – Brandon T. Hill II in his incredibly consistant 6th Gen. He ran 10.4’s-10.5’s all weekend long in 100 degree heat, AND was the fastest car in the Modified class (outside the high dollar shop cars). With a personal best time of 10.1 @ 134mph […]
We took Ryan Stevens stock bottom end Camaro SS to Memphis this Thursday to dial in the tune, and just happened to line up next to a clean boosted S550 Coyote. Enjoy!
IN STOCK NOW! Brand new WELD Racing Street and Strip Drag Wheels! All WELD wheels are “Made to Order” – so the only way to get them fast – is right here! We have sets of the very popular S71 and S77 style wheel for: 2006-2013 C6 Corvette Grand Sport / Z06 2010-2015 5th Gen Camaro […]
Congratulations to Ryan Stevens for breaking the Stock Bottom End 5th Gen Record AGAIN! 9.87 @ 133mph in 3300 DA. This achievement didn’t come easy. After having traction issues all day Friday, we painfully watched the SBE record slip away to a competitor. Knowing that Ryan’s car had more in it – a group of our GPI […]
Gwatney Performance is now a Concept Performance Authorized Dealer! We have the BRAND NEW 1500+HP Aluminum LSR Blocks in stock and ready to ship! If you are in the market to do a monster build – we’d love to help!
We are excited to announce the brand new GPI Rewards Program. We’ve backdated the points – so if you’ve made an online purchase in the past 12 months – you have points pending in your GPI Points Account! We want to keep improving the experience for our customers, and reward you all to show our […]
We can’t believe CamaroFest 8 is already almost here! We’ve been a proud sponsor of this event for several years, and are proud to continue our partnership in 2018. We will be headed up on the 12th to get our booth set up, and coming home on the 15th. Since a big part of our team […]
Congratulations to our own Ryan Stevens for setting the new Stock Bottom End NA 5th Gen Camaro Record! After years owning the 5th Gen NA record with his previous 416ci setup – he decided to reenter the Stock Bottom End ring. In preparation for CamaroFest 2018 – he decided to start from scratch with a […]
There is no better way to prove your car, than a standing mile race! If watching 1k+rwhp cars being pushed to the absolutely limits (and sometimes beyond) is your thing – we have that in common! We had an incredible time supporting our friends, making new friends, and helping everyone push their cars to […]
Want to experience what it feels like to do a gentle highway pull in an 1100rwhp Z06?
It’s a well known fact the direct injected LT1 / LT4 engines have fuel starvation issues at high boost levels – which leads to blown rings and melted pistons. We are developing a port fuel injection system system (similar to the new ZR1) utilizing the 42 Autosports Port Injection Control Kit and Haltech EMS to supplement the factory fuel […]
As a result of the increased demand in our products and services, GPI is looking to add members to our team! We take hiring very seriously. We recognize that GPI’s reputation and continued growth rests entirely upon the the collective efforts of the team. Our team is comprised of extremely motivated, passionate, knowledgeable, and versatile […]
Bulletproofing the LT for Boost The LT series GM engines are incredible powerplants as designed – however unlike their predecessor (LSx) – the LT’s commonly rebel when power adders such as superchargers, turbos, and nitrous are added. unlike the LS – the LT’s commonly rebel when power adders such as superchargers, turbos, and nitrous are […]
(Update) This event is complete. Head over to ULTIMA Mile to check schedule and register for future events! Exclusive runway event that allows you to run your car flat out for a full mile. Max 50 cars at the event, so you can run as often as you like. Mile Racing Details Show what YOU […]
#TeamGPI is proud to welcome our newest sponsor – White Motorsports (@WhiteMotorsports4878) and the 620hp GPI powered MAX Performance LS3 w/ LS7 Top End. This competition ready Jimmy’s 4×4 Bloodline Podium R is freshly tuned, and ready for the 2018 Dirt Riot Series Season which begins March 17th in Laredo, TX. Good luck this season […]
We are proud to welcome our newest member of the 1000+rwhp Club! #TeamGPI Who’s next?? 2012 Corvette Grand Sport Centennial Edition w/ LS9 Block Ported Heads Twin GTX3582R Turbos Custom Grind Cam Flex Fuel System w/ Meth Injection
In speaking with our customers, and browsing various automotive forums – I have observed a lot of confusion and misinformation concerning hydraulic lifter operation and preload specification. I have concluded it may be helpful to provide some information on this subject. Anatomy of a Hydraulic Lifter A hydraulic lifter isn’t too complicated. It consists primarily […]
THE ENGINE DYNO RESULTS ARE IN! 150HP MORE THAN STOCK LS3! Here is our latest testing of the LS3 / L99 MAX Performance Head & Cam Package. We’ve taken the goodness of the LS7, and adapted it to the LS3 / L99 platforms, to create a package that is the best of both worlds! The […]
As some of you know our friend Marcus Brookes was involved in a terrible accident November 4, when he and Chris had taken his car down the highway for a test drive. Something didn’t feel right with the car so Marcus pulled over on the shoulder to check it out. As they got out of […]
After many months of working in secret – we are proud to introduce the GPI MAX Performance Head & Cam Package for LS3 / L99 applications! This package is not for the faint of heart. With a huge powerband, torque down low, and an explosive LS7 top end – this is a no compromise NA […]
This truck has just been listed for sale here! This has been a very special build for us. If you’ve ever dreamed of going absolutely crazy on a build, and making something absurdly fast that was never designed to – check this one out! Just imagine the look on that proud Z06 owners face when […]
This has been a very exciting week for team at GPI. We’ve finished up several very exciting builds, and this one is certainly no exception. This car was purchased by the current owner back in 2010, and has been a GPI car for many years. It started life as a heads / cam car, and […]
The Wait is Finally Over! For those of you with a 2016+ Camaro SS, or a 2014+ Corvette – we have our Gen 5 LT Cam Packages in stock, and ready to ship! Why GPI? Gwatney Performance has a long history with VVT Camshafts, and we have built a large portion of our reputation around […]
GPI Exclusive! For those of you with a C7 Corvette, 6th Gen Camaro SS, or any Gen 5 LT powered truck or SUV (Silverado, Sierra, Tahoe, Suburban, Yukon, or Escalade) – we are happy to annouce our new Valve Spring Compressor Tool! No more risking damage to your head by using the current Valve Spring […]
The Sad Story. This Z06 came to us after a very unfortunate “high RPM event”. We are told it was trailered all the way from Mexico to see us, but sadly – the situation was pretty bad. The internals of the motor look to have been used in a Blendtec commercial – suffice to say, […]
Over the past 10 years GPI has grown from being a single dedicated service bay in the back of Gwatney Chevrolet, installing “bolt on” performance parts, to what it is today – an LS and LT skunkworks operation that is actively developing and building performance parts that take the GM Performance Platforms to the next […]
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.
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.
Affirm has a dedicated team in San Francisco at Affirm HQ, ready to answer your questions and help out however they can.
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.
You can pay your Affirm bills online at www.affirm.com/pay. They accept payment by debit card, bank transfer and 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.
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.
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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