As the title reads, I'm looking for which flow 40 series SI/DO are compatible with our trucks. I'm assuming, from searching and scanning the threads, that at most I'll want 2.5". I thought I had saved a thread with which worked on our trucks, but I guess not.

 

9425422

http://www.flowmastermufflers.com/pr...oducts_id=3401

 

had a feeling it was that one. I was scanning their site before and after making my post.

Thanks

edit: what about original 40, 3" SI/ 2.5" DO?

Bah, why can't I find the post I'm after?!

 

if you dont want the delta flow and want to save your self a little bit of money drop the 9 infront of the numbers... its the same muffler and you wont notice a difference....the delta flow is made mainly for cars, but the muffler sits so far back that it doesnt effect the cab of the truck....

 

IMO a dual 2.5 out is way too big for the ranger. you will loose backpressure which in turn looses torque at lower RPMS.

I have SI/SO Bolra with just 2.25 the whole way and it is alot better than any other exhaust i have had. I have had SI/DO flowmaster and SI/DO magnaflow.

 

ya lost me. When I enter 425422 into flow's site search it returns only 9425422, which is the delta.