ok im trying to figure out what exhaust setup will be louder, my current one which is just a turn down in place of the muffler and tailpipe...

or a y-pipe where the turndown is out to 3.5 or 4" tips

and would it even be worth it to take off my 4 stock cats and put in 2 high flows unless i do a full true dual exhaust or would it be worth it to do it with the y-pipe setup too??

any help would be great

 

on my 98 f150 4.6L i deleted the 2nd set of cats and had a y-pipe installed where the muffler was and had 3.5inch tips. that was a very loud setup, i could be heard a mile away turning a corner. lol.

 

True duals with 2 hi flow cats. Would be the loudest of those

 

Run hi-flow cats with true duals dumped with tips on them, it'll really roar.

 

ya i really want to do the full true duals but im not sure if i will have enough money that i can afford that so i was looking at some other less expensive options

 

Hi-flow converters would really help it.

 

even having a si/do or any muffler at that with high flows sounds great

 

so you guys think its gonna be worth it to put high flows on with either a y-pipe or si/do muffler?

 

Ofcoarse. All 4 OEM cats are very performance and sound restrictive. Replacing with hi-flow converters which flow 40% better and resonate no sound, damn right its worth it

 

alright now im pretty convinced that i will put high flows on

now where can i get the cats, y-pipe, tips and possibly tubing so i could do it myself maybe at??

 

Summitracing.com

 

Cat part #s 94306, 94006, and 94106 will work for your truck. Summit Racing carries the 94306, and the Magnaflow 2.5" dual - 3" outlet Y pipe. Performance Peddler and Performance Curve offer the other cats. Not sure if you would wanna do it yourself because the pre-cats are at an angle, you will need a couple pieces of bent pipe, then you'll need to get the O2s mounted after the cats.

 

Put the high-flows on! I have them on my 99 f150 and i gained low end but i didnt do it myself i took it in... they did a good job! also its twice as loud!

 

Do the high flow cats have a bung for the o2 sensor? I may end up having these put in with some dynomax bullets

 

Some do, but they dont funtion properly, the rear O2s need mounted after the hi-flow converters.