hi guys
i measured the inlet tip of my exhaust at 2.25 ! but outlet is 2.5
when you guys speaks 2.5 piping is that outlet dimension

so would that mean that dual 2.25 inlet pipe catles is good for 600whp ?
thx for clearing this

 

What exhaust? photo please.

 

Yes, But also depends on exhaust and cats ..
I did it with my 100 cell Milltek,,,But we are talking Rear Wheel HP only..

 

no idea for the exhaust brand ! current setup gt700 kit but i'm guessing my exhaust is restrictif !but still i did 625 on the dynapack whit that catless exhaust

 

Take a picture of the underside mufflers to give us an idea..Maybe its a Milltek because EVO use to have that as the exhaust with their kit,,then they went to Fabspeed..

 

Does a 2.75" catless and X pipe exhaust good for 800+ rwhp?

 

here you go John is that system a miltek ? correction its not 2.5 OD but 2 3/8 OD and 2 1/4 ID

 

It looks sorta like a home made system?
Also I did a dyno comparisons test with a 2.75 X against my Milltek on a AWD Dyno last month.. I made a thread on it.

 

saw that John thx for all you testing ! measured my `in` muffler pipe at 63.5 OD mm and muffler `out` pipe 60 OD mm ! strange that lots of brand go that way...

 

You can open those tips and expand the piping,,, did a thread on that with my Milltek a while back ago.
Also after that mod, I cut them off completely and welded 2.75' piping and tips on.. Did a thread on that also..Lol.

 

[QUOTE=johnspeed;3896909]You can open those tips and expand the piping,,, did a thread on that with my Milltek a while back ago.
Also after that mod, I cut them off completely and welded 2.75' piping and tips on.. Did a thread on that also..Lol.[/QUOT

i already read all does tread thx for that :-) the problem is i have no idea what inside that muffler !so no spending there!

John im guessing that 2.5 OD piping is 2 3/8 ID can you confirm this?

 

3" at that level