2005-up GM LS4 V8 and 4T65-E HD FWD
*Want to see the step-by-step swap progress putting this engine/transmission into a Fiero? Click here!*
or you can check out the finished swap here
Engine Specs
Displacement: 5.3L / 325 cu in
Bore: 96mm / 3.78in
Stroke: 92mm / 3.622in
Compression Ratio: 9.9:1
Firing Order: 1-8-7-2-6-5-4-3
Displacement on Demand Cylinders: 1-4-6-7 (also known as "Active Fuel Management")
Valve Lift (DoD version): 0.490" intake and exhaust (from GM spec)
Valve Spring Pressures (closed/open): 76lb @ 1.8" / 220lb @ 1.32"
Valve Diameter: 2.00" int. / 1.55" exh.
SAE Certified Horsepower: 303hp @ 5600rpm
SAE Certified Torque: 323ft.lbs @ 4000rpm
Maximum Rated Engine Speed: 6100rpm
Total Engine Weight (Dry): 478 lbs (does not include power steering pump, wiring harness, or computer)
Transmission Specs
RPO / Info: MN7 (has 258mm torque converter and heavy duty gearbox; manumatic/TAPShift option)
5-postion shift quadrant: P R N D M
Total Weight (wet): 214 lbs
Fluid Capacity: 13.4 qt
Gear Ratios: 1st: 2.92
2nd: 1.56
3rd: 1.00
4th: 0.70
Rev: 2.38
(click a thumbnail below to see full-size picture)
