You will only lose power if your exhaust piping is to large for the amount of power your engine produces. Oversized piping hurts exhaust velocity, since exhaust pulses are too small and no longer exit in a striaght mannor. Instead they bounce off the inside of the pipes, thus slowing down.

Like this



A properly sized exhaust system for your engine output (or future output) will not cause perticular low end problems.
Make sure your collector, cat, and exhaust piping fit your overall goals for engine performance.

It will add HP, because you have a bottleneck at your cat right now. Quality Carsound cats flow almost as well as a test pipe, and it will be 2.25" (or bigger depending on your exhaust diamater) instead of 2".

 

how much are most sets of cams ive been seeing like 600 is that reasonable or not. i forgot what kind they were but i just want to know how many horses and stuff like that will i get out of them bad boys

 

A smaller exhaust will benefit low end torque, at the sacrifice of power.

You can't have a properly sized exhaust for 750 rpms to 8000 rpms.

 

i would say turbo if u have the money to spend on it.

 

What kind of budget are you workin with here? I think the best advice that people give on this board are those with some amount of organized plan. Make a goal for what you want out of your car and work towards it. But high profile cams and some adjustable cam gears will give you some power. If you do decide to get those, you will want the car tuned and get the timing adjusted correctly so you can see the best possible gains from the mods. But forced induction(turbo/sc) is always on the top of my list, so if you've got the funds to support a turbo motor.... go for it.

 

yup.

I was refering to using a pipe that is to wide for your engine output. IE 3" exhaust on a stock GSR. Even at peak HP you are not generating enough exhaust for the diamater.