2023 C8 Corvette · Track Spec

Everything bolted on, welded in, or fabricated for pace. Updated as the build evolved.

Aerodynamics Bought · Built · For Sale ▾

• AJ Hartman C8 Splitter Kit Bought Carbon-fiber front splitter with profiled underside. ajhartmanaero.com
• GT4 Wing Bought High-downforce wing for Thunderhill and Laguna pace.
• Rear Diffuser Bought Keeps the rear planted on high-speed sweepers.
• Custom Splitter Endplates Built For Sale Carbon-nylon 3D printed endplates and mounting designed for the AJ Hartman splitter. Get the STL · Buy the kit
• Splitter Diffusers Built For Sale Original "baby diffuser" design 3D printed to extend the AJ Hartman splitter underbody. Get the STL
• Front Brake Duct Blockers Built For Sale Nylon 3D printed blockers. Reduce drag and increase front downforce on tracks where brake heat allows. Get the STL
• Control Arm Ventilation Strakes Built Verus Engineering design, 3D printed in-house. Original Verus product
• Titanium Splitter Pucks Built For Sale Premium Original design, SendCutSend Grade-5 titanium. Light, small, durable. STL alternative available for budget builds. Buy the kit · Get the STL
• Hood Vents Built Hand cut and ducted to evacuate heat and reduce lift.

Brakes Stopping Power ▾

• AP Racing BBK Bought 6-piston front kit with floating rotors for repeatable pedal feel.
• Racing Pads Bought Track compound matched to rotor temps.
• Stainless Lines Bought Full kit to lock pedal travel even when fluid is boiling.
• Front Brake Rotor Temp Bracket Built For Sale 3D printed bracket with M5 threaded inserts. Holds an IR/temp sensor at the rotor for track-day brake-temp data. Get the STL

Suspension Grip & Balance ▾

• Penske Coilovers Bought 3-way adjustable; dialed in for Laguna and Thunderhill baselines.
• 900 lb / in · 2.25" Springs Bought Front spring rate dialed for the aero loads at speed.
• Adjustable Sway Bars Bought Front and rear with quick-change settings for different tracks.
• Camber Plates Bought -3.5° up front to keep 305s alive.

Safety Strap In ▾

• Roll Bar Bought 4-point chromoly, paint matched, installed in-house.
• Bucket Seats Bought Recaro Podium shells with custom mounting.
• 6-Point Harness Bought Schroth Racing, sub belts routed through custom brackets.
• Custom Fire Extinguisher Mount Built For Sale Premium 2.5 lb extinguisher in a self-fabricated aluminum mount under the driver seat, laser cut via SendCutSend, secured with a quick-release pin. STL alternative for budget builds. Buy the kit · Get the STL

Wheels & Tires Contact Patch ▾

• Wheels Bought 18x11 front / 19x12.5 rear lightweight forged setup.
• Tires Bought 305 / 315 Cup 2 R, favorite combo for warm California tracks.

Engine & Exhaust Sound & Flow ▾

• Corsa Sport Cats Bought High-flow catalysts for the LT2.
• 2M Fab Long-Tube Headers Bought Mid-range torque and tone. 2mheaders.com
• Paragon Stainless Catback Bought Stainless cat-back, wakes up the LT2 above 5k rpm.
• Throttle Controller Bought Trims drive-by-wire lag for sharper throttle pickup at corner exit.
• DCT Neutralizer Tool Built For Sale Vibe-CAD'd, SendCutSend laser-cuttable. Holds the C8 DCT in neutral so the car can be moved without the engine running. V1 requires hold; V2 self-locking is in development. See the tool
• DCT Service Kit Built 3D printed organizer box plus every tool needed to access the DCT: T15 stubby ratchet driver, magnet pickup, trim removal tools.

Data & Telemetry Numbers Tell the Truth ▾

• AIM XLog Data Logger Bought Primary logger. Wired into the C8's analog and CAN signals for full-spectrum capture.
• XLog Magnetic Mount Built For Sale 3D printed XLog cradle. Mounts via N52 neodymium magnets. Sticks to any steel surface in the cabin. Sold as STL or full kit (printed mount + magnets + adhesive). Get the STL · Buy the kit
• AIM Solo2 DL Mount Built For Sale 3D printable mount for the Solo2 DL. (No longer running Solo2 myself, the file still works.) Get the STL
• TeamPlus TPMS + CANgate Bought Live TPMS feed routed through the CANgate gateway into the car's data bus.
• CANgate Screen Holder Built For Sale 3D printed cradle for the CANgate display. Driver eye-line position, no glare. Get the STL
• Telemetry-to-XLog Wiring Built For Sale Custom analog and digital wiring tapping selected C8 sensors directly into the XLog. Available as PDF guide, full physical kit, or both. Buy the guide · Buy the kit
• C8 CAN Bus DBC Pack Built For Sale Premium The big one. I tapped the C8's chassis CAN, sniffed the traffic, decoded the messages, and wrote DBC files that turn raw frames into named signals: RPM, throttle, brake pressure, steering angle, fluid temps and more, for AIM, MoTeC, and any DBC-aware tool. Available standalone, or as a kit with harness, install guide, and video walkthrough. Get the DBC pack

Audio · Video · Comms Capture the Run ▾

• Rear-Mounted Exhaust Mic + Plate Cam Built For Sale Microphone wired through the engine bay to the rear license-plate area paired with a rearview camera. Clean exhaust audio piped straight into the camera's audio/video input. Available as a full kit, a step-by-step PDF, or watch the video build. Buy the kit · Read the PDF

2021 718 Cayman GT4 · Round Two

Bought June 2026. Arrived track prepped by the previous owner. Getting measured before it gets modified.

How It Arrived Previous Owner Prep ▾

• Swift Springs 440 lb/in front, 420 rear on the stock PASM dampers. Front stiffer than rear, rotation biased on purpose.
• Rear Anti-Roll Bar Stock adjustable bar set to maximum stiffness. The tail happy part of the setup.
• Forgeline Wheels 19x10.5 front, 19x11 rear. Dedicated track set.
• Hoosier Track Attack Pro 265 front, 305 rear. R-comp, heat cycle limited.
• Paragon Brakes R7 pads on Paragon steel rotors.
• Antigravity H6-60 Lithium True 60 Ah, roughly 27 lb saved. To be confirmed on this car.

The Plan Measured First ▾

• DSC Sport Controller Keeps the OEM PASM dampers, replaces the algorithm. Top suspension pick and a way to tame the loose rear.
• CAN Tap + Lap Logging Drive CAN tap in the footwell, lap timing, the same decode first approach as the C8.
• Fire Extinguisher Mount Halotron bottle on a proper metal mount.
• Race TPMS Justified now, the dedicated track wheels are already fitted.

Mod Log Costs · Verdicts ▾

• Nothing yet, on purpose Every change lands here with the real cost, a before and after number, and a worth it verdict.