s400 downpipe size

[Redbowties88]

so im upgrading my exhaust in the very near future. (still running a partial 3 1/2") and i'm curious as to the size of an s475/480 downpipe so i will know whether to get a 4" or just get a 5" as i plan on somewhere down the road running twins on the truck.

thanks

 

[hondarider552]

can't fit 5" downpipe from S480 on stock turbo. IIRC Cheetah is coming out with 4" for stock turbo, but I havent heard much. Maybe brayden will jump in.

 

[SDP]

The t6's are a 5" outlet, which is probably what you'd have if you went with twins. That doesn't mean you have to use 5" all the way though, you can reduce it down to 4" or cut and weld a 4" v-band flange to the housing.

 

[Redbowties88]

The t6's are a 5" outlet, which is probably what you'd have if you went with twins. That doesn't mean you have to use 5" all the way though, you can reduce it down to 4" or cut and weld a 4" v-band flange to the housing.

thanks guys thats what i meant so i don't need to reduce it down the line to 4"

might as well just get the 5" so its there in the future if needed

 

[SDP]

The aftermarket 5" exhausts still use a 4" frontpipe, you'll need to plumb in a 5" frontpipe at the same time to make it a true 5".

 

[Redbowties88]

The aftermarket 5" exhausts still use a 4" frontpipe, you'll need to plumb in a 5" frontpipe at the same time to make it a true 5".

really? didnt know that...i though my buds was 5" all the way to the downpipe flange.....


so it just gets bigger where the cat connection would be?

 

[SDP]

Not sure about the cat, never had one

 

[Redbowties88]

Not sure about the cat, never had one

well im trying to figure out where it transitions from 5" to 4"....cause ive never noticed one in pictures. traditionally the "front pipe" starts where the cat flange is