When I bought the truck it had 4" exhaust all the way back. The only mod I did to the exhaust was strait piping it. I was doing some wiring the other day and I found out I have only 3" off the turbo and then about 5" back it goes to 4. Is this right or should I change it. I was thinking about upgrading to a bigger ehaust housing when I do injectors, should I just wait untill then?

 

I think Banks is the only guys that have a 4" downpipe connector as a replacement for the stock 3".

 

So is pretty much everyone running the same thing(downpipe) as me?

 

I am. Don't worry about it. It's not a major restriction by any means.

 

Ok, Thanks for the replies, I just wasn't too sure