downpipe

[the_watts10]

ok first of all i running no exhaust after downpipe and was wondring if the cat inside could burnt out and was wondering whats the upperhand to installing a catless downpipe? hp wise

[Legacy777]

Running a catless downpipe usually reducing back pressure and improves turbo spool.

[SubaruNation]

you need to have some sort of exhaust.

otherwise i think bad things can happen like backpressure and your car can spit out oil

[Boostedballs]

you need to have some sort of exhaust.

otherwise i think bad things can happen like backpressure and your car can spit out oil

Nope, turbo cars do not need back pressure. The lower the pressure downstream of the turbine, the better. The turbo works on pressure difference. High inlet pressure and low outlet pressure will make the engine rev very fast.

A naturally aspirated engine (N/A) isn't quite as simple. You need back pressure to control exhaust flow in the heads, based on your cam profile and many other factors.

[SubaruNation]

oh, good to know!

so if your car is turbo charged, you can just take apart your exhaust and nothing will happen?

[the_watts10]

yeah about the whole backpressure thing i found that out today ive been runing not exhaust besides the downpipe and just but a catback on it today and it is really spooling up like its suupposed to and its a alot faster
quieter but faster!!!