exhaust help
Thread Starter
|
Junior User
Joined: Feb 2013
Posts: 51
Likes: 0
exhaust help
i got a 1990 f150 4.9 and i have a thrush turbo muffler i want to put on it but i noticed the two cats and realized one is for the smog pump if i cut off behind the smog cat and do with out the other will i still get the sound im looking for?or do i need to cut off the smog cat to ?
Cargo Master
Joined: Apr 2003
Posts: 2,408
Likes: 5
From: Parkesburg PA
You need two cats for emissions reasons. Where do you live and do they do emissions testing. If they do and you cut off the rear cat you could fail.
The two cats are going to quiet things down pretty good. You may just want to cut off the exhaust behind the cat and see how it sounds. I did that on my 89 Bronc and ended up using a strait pipe to connect the tailpipe and it had a really nice sound to it. With a turbo muffler or even glass pack and it was almost as quiet as stock.
The two cats are going to quiet things down pretty good. You may just want to cut off the exhaust behind the cat and see how it sounds. I did that on my 89 Bronc and ended up using a strait pipe to connect the tailpipe and it had a really nice sound to it. With a turbo muffler or even glass pack and it was almost as quiet as stock.
Posting Guru
Joined: Feb 2013
Posts: 1,555
Likes: 1
because the o2 sensor is pre cat you should be able to take both of them off. if they do emmisions throw on an aftermarket high flow cat and you should be fine if you have the stock tune on the motor. if you changed it then it could fail
Thread Starter
|
Junior User
Joined: Feb 2013
Posts: 51
Likes: 0
You need two cats for emissions reasons. Where do you live and do they do emissions testing. If they do and you cut off the rear cat you could fail.
The two cats are going to quiet things down pretty good. You may just want to cut off the exhaust behind the cat and see how it sounds. I did that on my 89 Bronc and ended up using a strait pipe to connect the tailpipe and it had a really nice sound to it. With a turbo muffler or even glass pack and it was almost as quiet as stock.
The two cats are going to quiet things down pretty good. You may just want to cut off the exhaust behind the cat and see how it sounds. I did that on my 89 Bronc and ended up using a strait pipe to connect the tailpipe and it had a really nice sound to it. With a turbo muffler or even glass pack and it was almost as quiet as stock.
Posting Guru
Joined: Feb 2013
Posts: 1,555
Likes: 1
if you want it to sound stock get factory replacement muffler from autozone or rockauto. if you dont want it stock sounding the turbo thrush should work just be warned that if you get away from the stock sound they can sound like a tractor. you can usually take them both off and just leave the emissions stuff off (Air pump hose) and if you are worried about emissions than you can leave the first one on or get an aftermarket high flow cat
Thread
Thread Starter
Forum
Replies
Last Post
Wisconsinford
1987 - 1996 F150 & Larger F-Series Trucks
14
Apr 9, 2013 07:59 PM
