Engine Type
make selection
2.0L 4cyl
2.2L 4cyl
2.3L Quad 4
2.4L DOHC 4-cyl
2.5L 4-cyl
2.8L 60deg V6
3.0L 90deg V6
3.1L 60deg V6
3100 V6 (1994-up OHV)
3300 V6 90deg
3.4L (pushrod) 60deg V6
3400 V6 (1996-up OHV)
3.4L DOHC V6 60deg
3.5L DOHC 90-deg V6
3.5L OHV non-VVT V6
3.5L VVT V6
3.6L DOHC V6
3.9L VVT V6
3.8L 90deg V6
3800 Series I V6
3800 Series II V6
3800 Series III V6
4.2L I-6
4.3L 90deg V6
4.3L V8 L99
4.8L V8
5.0L V8 (305ci)
5.3L V8
5.7L V8 (350ci)
5.7L V8 LT1
6.0L V8
6.2L V8
6.6L GAS V8
383 SBC
400 SBC
7.4L V8 (454ci)
8.1L
Duramax Diesel
Other
Injection Type
make selection
Multi-Port Fuel Injected
Throttle Body Injected
Direct Injected
Power Adder
make selection
None - Naturally
Asperated
Supercharged
Turbocharged
Nitrous Oxide
Compression Ratio
OEM - Stock
8.0:1
8.5:1
9.0:1
9.5:1
10.0:1
10.5:1
11.0:1
11.5:1 or more
other
Thermostat Temp
make selection
160 F
170 F
180 F
195 F
Camshaft
make selection
OEM stock to engine
aftermarket mild
performance
aftermarket street/strip
aftermarket race
Cylinder Head
make selection
OEM stock cast iron
OEM stock aluminum
OEM iron ported
OEM alum ported
aftermarket cast iron
aftermarket aluminum
Transmission Type
make selection
3-speed Manual
4-speed Manual
5-speed Manual
6-speed Manual
7-speed Manual
125-C Auto
440-T4 Auto
4T60 Auto
4T60-E Auto Electronic
4T65-E Auto Electronic
4T80-E Auto Electronic
THM200 Auto
THM350 Auto
THM400 Auto
2004R Auto OD
700R4 Auto OD
Powerglide 2-speed Auto
4L60 Auto
4L60-E Auto Electronic
4L80-E Auto Electronic
4-speed automatic (electronic)
5-speed automatic (electronic)
6-speed automatic (electronic)
8-speed automatic (electronic)
10-speed automatic (electronic)
Other (not listed)
Axle Ratio
make selection
RPO CODE Entered ---->
2.14
2.41
2.73
2.77
2.84
2.93
2.97
3.05
3.06
3.08
3.18
3.23
3.27
3.29
3.32
3.33
3.35
3.42
3.43
3.61
3.65
3.73
4.10
4.56
Other (not listed)
UNKNOWN
Select RPO Code Here
F17
F75
F79
FW2
FW4
FW5
FW7
FW9
GT4
GT5
GH2
GH8
GU1
GU2
GU4
GU5
GU6
GX3
HC4
M17
M19
MG2
MT2
MY8
VSS Type
make selection
stock to transmission
cable-driven
electronic digital
(80s GM)
electronic Permanent
Magnet
UNKNOWN