approx how much hp do they both add and do they make the car ALOT louder or just a bit? Any help would be appreciated...

Khal

 

glad some people are responding...

 

Headers with Test pipe combined will definetly give you a noticiable gain expect 8-11 hp gain if not, bit more. Not to mention test pipe will also give you a SEL therefore don't forget to install 02/fouler . Sound wise everything depends what kind of exhaust you are running but, either ways it will get louder & raspy.

 

Im sticking to the stock exhaust. def dont want to get a different one. But, SEL? 02/fouler?
Just a bit confused...

 

depends on the year of your car. my test pipes (for sale) didnt throw of the check engine light so non-foulers were not needed.

 

I have an 06 5AT. what's the power increase and how much do you want for them?

 

power increase should be the same as all the others. m looking for 100 + shipping which wouldnt be more than 20 bucks or so.

 

15-20

 

if u shange the exhaust it will make a lot of difference.

 

The exhaust is def something i dont want to change. im enjoying the beautiful humm of the stock exhaust...and i personally i was just never a big fan of aftermarket exhausts. they're too loud. what are some good brands to look at when it comes to test pipes and headers?