Hey all.
So I've got a completely stock r33 s2, and want to build it up as a bit of a sleeper. Really stock looking on the outside, but with a bit of a punch under the bonnet. Nothing too crazy, maybe would like to push up to 200kw over time.
The aim of the game is to have the car 100% legal, or as legal as is humanly possible. I got a Just Jap return pipe intercooler put on which uses the standard intercooler pipes and did not require the cutting of the body etc. First mod= legal. A dyno run after the installation revealed that the car has 145kw at the wheels.
The other day I chuck a high flow k&n panel filter in the standard air box. Noticibly smoother accelleration etc. Second mod= Legal.
Now it comes time for the exhaust. The car needs to be under the legal db limit.
I bought a second hand 3 inch dump pipe from the forums, ready to bolt on.
I also bought a second hand 3 inch cat back exhaust, minus the end muffler. The system is designed to bolt up to the cat and can accomodate an aftermarket muffler, and has a flange, so that the standard muffler can be bolted on as well (for when the EPA bites you in teh ass presumably. The idea is to not get to this point however). Both of these parts appear to be mild steel, not stainless.
So now, to recap, I need a 3 inch high flow cat and an end muffler to complete the system. (If anyone is selling any of these items btw, let me know)
My question is. What sort of muffler should I have put on that will flow well, yet ensure that the system falls within the legal db limit? Please also keep in mind that I would like the muffler to look as stock as possible- I guess that rules out cannons etc.
Does anyone have any suggestions? Also, does anyone have any idea how much of an increase in power this should net me? Any tips etc, let me hear them as I am relatively new to the scene and am keen to learn.
Cheers.