2003 Chevrolet Corvette Z06 – 39,800 Miles

Extensively Upgraded Drivetrain & Engine – Tastefully Built, Street & Track Ready

This 2003 Chevrolet Corvette Z06 has just 39,800 miles and has been meticulously upgraded with performance and reliability in mind. The work done touches every critical area—rear differential, transmission, clutch, and motor—making this C5 Z06 a truly sorted and high-performing example.

Rear Differential

• Upgraded with C6Z shafts (two-piece right side shaft)

• Performance clutches installed for better grip under load

• Heavy-duty springs for improved durability

• All new seals and gaskets

• Case media blasted and painted for a clean, refreshed finish

Transmission (rebuilt & reinforced)

• G-Force 9310 27-spline mainshaft for added strength

• Carbon blocker rings for smoother engagement

• Steel 3/4 fork upgrade

• Billet keys (1st–6th gear)

• Bronze pad kits for longevity

• Upgraded sliders (1st–6th gear)

• All new bearings, seals, and gaskets

• Transmission brace for additional support

• Case media blasted and painted

Clutch System

• Monster LT-1S clutch – built to handle power and torque reliably

• Tick Performance adjustable master cylinder with remote bleeder for precise pedal feel and easy service

Engine & Top End

• Factory 243 heads ported & polished

• Custom grind camshaft from Advanced Induction

• BTR titanium valve springs & retainers

• Melling high-volume oil pump

• Upgraded pushrods

• 40 lb injectors to support fueling demands

• New head gaskets, water pump gasket, and timing cover gasket

• LS7 lifters and lifter trays

• Comp Cams trunnion upgrade

• ARP hardware throughout (head studs, crank bolts, intake bolts)

• C5R timing chain for race-grade reliability

Exhaust

• Kooks long-tube headers paired with a catless X-pipe

• Factory titanium mufflers retained for a refined, aggressive note

Wheels

• Lightweight Forgestar F-14 wheels

Mileage on Components

• Transmission, clutch, and rear differential: ~1,500 miles since rebuild

• Engine upgrades completed at ~35,000 miles

Summary

This Z06 has been built the right way—with proven components, careful assembly, and tasteful upgrades that enhance performance without compromising reliability. With fewer than 40k miles and a drivetrain refreshed less than 1,500 miles ago, it’s ready for its next enthusiast owner to enjoy both on the street and at the track.