So, ballpark, if I got a GMPP catback and CAI, what kind of performance boost could I expect, individually and collectively?
Ron
This has been discussed extensively in the past. For convenience I am including the results of my extensive absorbtion of info here:
1. Without a tune, no mod will provide any performance improvement
2. The only mod that all can agree on as adding performance is a high flow cat which has been measured to provide variously 16 - 18 HP gain
3. Charge tubes have been claimed to:
a. add some HP by a couple of members who swear they have data to prove it
b. not add any HP but does improve performance by delaying or eliminating the HP roll off at higher RPMs. That is, the stock charge tubes generate turbulence at RPMs of aroung 5000 and up that causes a reduction in HP measured. Smoother, less turbulent charge tubes do not reduce HP either at all or not as much thus allowing the motor to produce more HP longer after the peak HP region
4. The factory air filter is so well designed that no aftermarket CAI has demonstrated any performance gain.
5. The factory cat back in like manner is not a limiting factor. No after market catback has demonstrated measurable performence improvement
So
When asked I recommend
1. Get the DDM ProBeam
2. Get a tune (my favorite remains the GMPP because its warranteed and is less likely to cause problems down the road, not because its the "best" tune)
3. Get a high flow cat
4. Get the coolant check valves installed
5. Get the charge tubes of your choice to maximize power production if you drive above 5000 RPM on a regular basis.
6. Get the cat back of your choice to give you the sound and look you desire
7. Get something from Norm because you can
8. Never kneel in the passanger seat!:thumbs: