GPI – Complete Gen 5 LT1 / LT2 / L86 Drop-In Piston / Connecting Rod Package (2014+ Corvette / 2016+ Camaro SS)
This kit includes:
- (8x) Diamond Pistons with 2618 Forging Material in Standard (11.5:1) or Lowered (10.25:1) Compression Ratio
- (8x) 6.125 Compstar Connecting Rods
- (8x) Heavy Duty Pin, Locks, and Ring Package
- Designed to Support 1000+HP Applications
- No Balancing Required! Drop-In Piston and Rod Upgrade!!
Total Seal Recommend Gap Chart
GPI - LT1 Drop-In Piston / Connecting Rod Package
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 added.
The LT powerplants have several weak links when boosted:
- the unique piston and ring land design which was intended for naturally aspirated duty is subject to failure under even minimal detonation.
- preignition has been associated with various detergents found in certain motor oils which become emulsified resultant of the fuel being sprayed under pressure into the cylinder creating unintended combustion
- We have found ring end gaps as small as .008 which will certainly butt together causing cylinder, piston and ring failures when subjected to increased heat and cylinder pressure.
- We have found LTI connecting rods during engine upgrades on stock forced induction engines which were slightly bent even though they were still asymptomatic.
Understanding these limitations – and because GPI strives to provide the best combination of power and reliability for our clients – we have worked with Diamond Racing and Callies to offer a no rebalance, standard bore, stock compression, drop-in solution for the Gen V 6.2 liter LT1 engine.
What does this mean for you? No machine work and no balancing needed. This is a complete drop-in assembly that can be installed while the engine is still in the car!
Gwatney Performance is proud to present a Complete Drop-In Piston and Rod solution for the Gen V LT1 / LT2 (6.2) Engine! This package is designed specifically for boosted 14+ Corvette’s and 16+ Camaro SS.
By working directly with Diamond Racing and Callies, and were able to get the exact same bobweight as the factory piston / rod assembly, and due to the heavier weight of the factory assembly – we were able to build an extremely robust piston and rod package.
This kit is designed to support 1000+HP applications and is the perfect match for your forced induction LT!!
Reliable and consistent high horsepower Gen 5 LT’s! Here is a recent build with these pistons. This is a street car, so power and boost levels are fairly conservative.
- GPI LT Drop In Pistons & Rods
- GPI LT Cylinder Heads
- GPI LT Camshaft (SS1)
- G1Pro Sheet Metal Intake Manifold w/ GPI Port Fuel Injection System
Give us a call at (501) 985-4947 or email email@example.com.
To apply for a dealer wholesale account – visit our GPI Dealer Application Page.
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Questions & Answers (15)
Customer questions & answers
Q I have a very low mileage car (about 1500); is honing the cylinders necessary or will factory cross hatch seat the new rings efficiently?
Asked by James on April 29, 2021 7:55 amA The Factory cross hatch will seat the rings fine
Q On a 2019 camaro ss lt1, what are the limitations for the stock crankshaft?
Asked by Charles Orlando on April 23, 2020 10:41 pmAnswered by the admin
We have made 950+ with the stock crankshaft. We do suggest main studs and line hone on the block past 700.
Q How much of extra clearance do the valve reliefs give you compared to stock? How much milling would you be able to do and still have similar clearance as stock?
Asked by Jorge Sosa on January 17, 2020 10:12 amAnswered by the admin
These have a .200 valve relief in those pistons. The factory pistons do not have any.
Q Do you offer drop in piston/rod combo which DOES lower stock compression. Around 10.5:1 or so ???
Asked by Osmo Nuric on November 19, 2019 6:37 pmAnswered by the admin We do not currently (11/19/19) offer a "drop-in" piston / rod solution that lowers compression. Update (4/1/20): We now offer a lowered compression Drop-In Piston Rod Combo!
Q How mush is the labor to Install piston and rod package in 2016 camaro ss
Asked by Marc Albarado on July 20, 2019 10:28 pmA
For installation, you're going to be in the $3200 range, plus tax and tuning.
Q Do you have drop in piston and rods for the gen 5 ss camaro ss ls3 and l99? If not why?
Asked by Thomas Miller on February 27, 2019 7:54 pm
Q Hello I have my own workshop for US cars (tuning and mechanics) here in Poland, and I would like to ask if shipping to Poland is possible? My client would like to install some parts which you have in offer to his Corvette. Best Regards, Maciej LoudCustoms
Asked by Maciej on January 25, 2019 7:49 amA
Please send us an email to support@gwatneyperformance and we'd be happy to work up a shipping quote to Poland for you!
Q are these ready for installation, specifically, do the new piston rings come pre-gapped?
Asked by joejoe on December 6, 2018 6:07 pmA
Thanks for the question! The rings are not pre-gapped, they will have to be file-fitted!
Q What is the finished bob-weight for the combo? Thanks
Asked by Grant on July 18, 2018 4:16 pmAnswered by the admin
Our drop in piston / rod package maintains the exact same bobweight as the factory piston / rod assembly.
Q what determines if you need standard or oversized bearings? is that something that needs to be measured before hand or should we just go with standard size if its going into a '16 corvette lt1 thats getting a cam at the same time?
Asked by michael n on July 15, 2018 12:31 pmAnswered by the admin
If the motor is in good shape, and not been damaged - the standard size bearings would be the way to go.