1_bad_4.0

i wanna put open headers i want it to be loud as fugde
has any one done it post pics and vids of idle and rev plzzzzz

1_bad_4.0

bu mppppp

trans_am7935

i have run headers to the mid/down pipe with no cat or cat back, and it sounded like a busted tractor when cold, but ok when hot. but you need the down pipe on there due the the O2 sensor being in it. unless you have a renix system (87-90) then it is in the header. still it would be too close to an open air source, your car would be permanently in open loop getting 8mpg the whole time

1_bad_4.0

do u have any idle vids and i want something loud my jeeps only for outdoors not road its in a trailer for trips

Gatchmo5710

Ive dumped it right after the cat and that was way too loud. idling was obnoxious.

1_bad_4.0

its just for mud so i can scare away

1_bad_4.0

v8s lol

duffman5001

IMO, if you want loud straight pipe it with a glasspack. Open headers can actually hurt your performance. google exhaust scavenging- a lot of people say you need "backpressure", well thats BS and a myth. But scavenging is a good thing.. Hope it helps..

1_bad_4.0

thanks bro

brookhart63

So on my jeep "farm use only" i have open heads. I get 16-18 mpg on" the farm". Sounds just like a tractor. Dead serious.

Metalgearmurder

My xj sounds like its got a gnarly cam lope/ drag car sound going on... It sounds sick.. but very obnoxious.. I smashed my cat on some rocks and proceeded to pump out all of the material at the same time I also cremped and destroyed my muffler back so its cut off after the now "gutted" cat....

Gee oh Dee

Technically this is a topic against forum rules.

Discussing the removal or modification on the cat is against Federal regulations.