I drive a 94 LS 5-speed, im having a backpressure problem in my exhaust, i have a AEM SRam intake with hi-flow cat, and 3A Muffler fireball series 3 1/2"tip, Ive heard mounting the exhaust at an angle alows better flow through the exhaust, and heard bigger piping would also help, guess im asking what do i need to do to get rid of the backpressure sound so its nice and smooth sounding.




Also was wondering if the gsr upper intake manafold bolts onto an LS, if it does would this be like buying aftermarket upper intakes.

 

what size is the exhaust piping and is the piping mandrel bent? might want to tell us that

 

get larger tubing. The size of the tubing would depend on what you plan on doing with your car, tubo..na... Do you mean intake manifold by 'upper intakes'?

 

Back pressure is pretty much a myth.

Whats the problem with your exhaust?

Your piping size should not be larger than 2.25", since you're still running a stock motor, the head can support much.

Anything larger than 2.25" you'll lose power.

and no a gsr intake manifold won't bolt on.

 

back pressure is no myth; all 4 cylinder cars need a certain amount of back pressure

 

Why would you lose power with a piping larger than 2.25"? Wouldn't that allow for better flow?

 

Any NA motor needs a certain amount of backpressure. The pressure causes a vacuum effect that "encourages" exhaust gases to be released quicker.

Cant imagine mounting the exhaust at an angle allows for any kind of flow improvement...the less bends the better.

 

"Backpressure problem?" Yeah, sure. If your cat isn't clogged and you are running stock size or larger piping, I seriously doubt it.

 

So as for a teg, would 60mm or 2.25" be the best choices for piping?

 

Well, what are you planning on doing? Keeping your simple bolt ons or a doing an NA build?