exhaust pipe?

[tomnlindsay]

so my friend gave this muffler with a burnt tip. not sure what kind but it has a 2.5 inlet and 4 outlet what size piping should i use? i ask because he said i should get 2.25 piping and i thought i should get 2.5 cause of the inlet size. what should i do?

[JoshM]

You can use 2.5" or 2.25" piping.
2.25" is ideal for a pretty stock F-series.
If you're running an H or heavily modded F, get 2.5".

2.5" will also be slightly louder than 2.25".

[rexload]

What engine do you have? You willl loose throttle response at low rpm with 2.5" piping and not enough gain at higher rpm to make up for it. I would definitely go with 2.25" piping (unless you are making 200hp+)
Also, have you looked into generic cat-backs on ebay? They are a little over a hundred bucks and a perfect fit. That may be a better option than buying a muffler and piping and then welding it together.

[tomnlindsay]

i have a f22a6 with cai and i have a header with a test pipe just want to finish the full exhaust and that was all i planned on doing. i would do the catback but he gave me this muffler.

[JoshM]

Unless you plan on doing more engine work, you'll be fine with 2.25" piping.

[tomnlindsay]

k thank you guys

[AD5OS]

Did you just want to cut your muffler off and get that welded on? They usually just expand the pipe or add a cheap already expanded pipe converter and weld that inline.

[tomnlindsay]

Did you just want to cut your muffler off and get that welded on? They usually just expand the pipe or add a cheap already expanded pipe converter and weld that inline.

i am going to run the 2.25 piping from the header back. i already have the header and the muffler just need the piping.