2013 Chevrolet Corvette Grand Sport
Project Overview
This rare-color Grand Sport came in bone stock (LS3 with 6L80E automatic) and baselined at 350 whp. The goal was to stay naturally aspirated while meaningfully increasing output with a matched, top-end package. The result is a sharp-responding GS that now makes 472 whp on our in-house Mainline Hub Dyno—+122 whp over baseline.
Specs
- Platform:
- 2013 Chevrolet Corvette Grand Sport (C6)
- Engine:
- Lingenfelter CNC-ported/rebuilt heads · LPE cam & valvetrain · ATI crank damper · Performance & Design XS intake manifold · Nick Williams 103 mm throttle body
- Drivetrain:
- 6L80E automatic
- Brakes:
- Factory GS
- Wheel/Tire:
- C7 Z06 Wheels Front 285/30 R19 Rear 335/25 R20
- Audio & Connect:
- Factory OEM
- Interior:
- Factory GS trim
- Baseline:
- 350 HP / 340 dFtLb
- Final Output:
- 472.1 HP / 491.6 dFtLb
- Dyno:
- Mainline ProHub Dyno
Build Details
Cylinder heads were sent to Lingenfelter Performance for CNC porting and a complete rebuild, then paired with an LPE camshaft and upgraded valvetrain. Supporting hardware includes an ATI crank damper, Performance & Design XS intake manifold, and Nick Williams 103 mm throttle body. Exhaust flow is handled by Kooks long-tube headers with an X-pipe. Once the body was mated back to the powertrain, we finished the car with a Billy Boat axle-back and a set of C7 Z06 wheels. Onto the in-house Mainline Hub Dyno, it tuned cleanly, picking up +122 whp for a final of 472 whp.
Dyno Results
Note: LS3 · LPE CNC heads & cam/valvetrain · ATI damper · P&D XS intake · Nick Williams 103 mm TB · Kooks LTs + X-pipe · Billy Boat axle-back
