Exhaust Down Pipe

[tgarison]

Hey Forum,

I am considering replacing the restrictive stock downpipe with a 2.5 inch one, what I want to know is, is there any sort of added fire danger from doing this? (going from a double walled pipe to a single walled pipe) Thanks in Advance and sorry if this isn't in the right place i couldn't find a sub section for exhaust.

 

[KeithGTP03]

If there were a fire danger, 90% of the peoples cars here would charcoal. The single wall is what helps them flow better.

 

[Nathan07GP]

Double wall doesn't do **** except restrict your air flow. Go with 2.5 DP. Dont worry about your fire wall catching on fire lol. My car is still ok

 

[Fivefingerdeathpunch]

Go 3in, make it worth your money.

Stock is 2.25 with ubend, is the 2.5 really worth it?

 

[Nathan07GP]

if he goes 3 inch he could lose back pressure. Hes not SC. on zzp 2.5 and 3 in are same price

 

[Fivefingerdeathpunch]

You know back pressure is a myth right?

A normal running car with a fully stock exhaust creates less than 1 psi of back pressure.

I run SD headers with the 3in downpipe with no cat converter and its as free flowing exhaust as you can get.

 

[MoarkatsINmuhtrailer]

and i run open headers numerous times...back pressure aint ****

 

[Nathan07GP]

in that case im going with the headers with a 3 inch down pipe thanks