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I have a 04 bmw m3 and i was wondering if it would be a good idea to remove
the stock resonator and put a straight pipe in its place to make the stock
exhaust system louder.
if anyone thinks its a bad idea or if it will mess up the car somehow
please let me know.
thanks.
M3lover
You will lose some performance if you do it.
99integra
you could always just drill some holes in your exhaust system...but be
careful about idling..... :orglaugh:
dodgerforlife
I can't see how you would loose performance by removing it but then again
I'am no BMW expert by no means.
If it were me I would remove it and see what happens, can't hurt anything
by experimenting.
ppauley/cobra freek
ppauley
You could always tune your car so it makes the louder sound itself, instead
of going the rice way and making ur exhaust system louder.
PS- Replace Cat with test pipe
Oomba
LOL, you could do like Jesse James did on one episode of monster garage.
He wanted his car to sound real loud but the race required him to have a
muffler. So he cracked open the muffler, gutted it, and then welded the
sheet metal back over it.
LOL.
diggisaur
I meant he would lose the back pressure that stock exhausts create
99integra
Straight-piping your Beemer will not hurt performance...you might even pick
up a little, but it won't be noticable. Stock exhaust systems have too
much back pressure as it is, so freeing up the exhaust a little could stand
to do you good. This just goes back to people not knowing what they're
talking about...there is a decent amount of horsepower to be had by
upgrading your exhaust system on most vehicles.....I'm sure the M3 has a
pretty good system on it.
Sick88Tbird
Whoa buddy I was just speaking from experience :doh:
99integra
Why would you want to make the thing louder? The drone in the cabin can get
pretty irritating. Knocking out the resonator will reintroduce the
pulsating noise and raise it an octave or two.
Wally
Whoa buddy, so was I. If you exhaust system falls off your little 4-banger
at the manifold...yeah, you're gonna lose a little power...mostly noticable
on the low end. I used to make exhaust systems for Grand Prix's of all
types and other GM W-Body vehicles. On a stone stock '01 GTP, the system I
built knocked off .4 seconds from the 1/4 mile E.T. The owner then began
complaining that wheelspin was a big issue when launching. Another
example...fox-bodied mustangs with a 5.0...from the factory they come with
high flow tubular exhaust manifolds(not quite good enough to be called
headers, but much better than the cast iron log style manifold) 4 catalytic
converters, and 2.25" pipe diameter. You replace the factory system with
full length headers, a 2.5" off-road h-pipe, decent performance mufflers
and you can pick up about 15-30rwhp....according to you, it should have
lost power.
Sick88Tbird
In fairness thouh the ford 5.0 heads have an exhaust port that is way too
small so it needs all the help it can get to expel the gas. On a properly
sized head port, putting a bigger exhaust on can cause a noticeable loss in
low to midrange power, without modifying the cam events.
Wally
