techinical specs

Technical specifications of the Fiero 2M8 after the conversion from a Fiero 2M4.

1988 pontiac fiero 2M8 - 4.6L v8

300 HP / 295 tq

300 HP @ 6000 RPM, 295 FT/LB Torque at 4400 RPM stock. The custom Magnaflow exhaust may slightly increase this.

4.6L V8 32-VAlve

Engine is swapped from a 1996 Cadillac Seville STS. 

4t80E 4-speed auto

Transmission is also from the Cadillac donor car. 3.71:1 final drive ratio. Strongest transverse automatic produced by GM.


CV Joints, axles, hubs and rims from the donor car. Front hubs drilled to 115mm to match the rear.


Brakes are upgraded from the original 10.5 inch rotors to 12 inch rotors. Compatible with 84-88 C4 Corvette rotors.


Upgraded 3 core aluminum radiator and engine oil cooler. Custom aluminum expansion tank in engine compartment.


PCM, PMZ, IC, ALB, RSSM modules with data link, fuel pump, cruise control, fuse block and sensors from donor car


All engine gaskets and seals replaced. Head bolts with inserts from Time-Sert installed. New water pump and thermostat. New valve stem seals.


New engine installed in 2022 has time sert head repair preemptively done to make sure the engine is bulletproof. Time serts are a GM approved and proven solution to head bolt issues.


Interior lighting upgraded to LED to increase gauge visibility.

0-60 performance

Fastest 0-60 time on 91 octane pump gas is around 5 seconds.


The interior is original with a few additions including leather covered seats and leather steering wheel. And yes, the horn works.