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Old 12-30-2004, 11:37 PM   #1 (permalink)
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Question Dual Exhaust on a 4 Cylinder?

Is a function dual exhaust possible on a 4 cylinder? To be functional would you have to have some type of custom header? Would a T pipe running out from the muffler work? What about a T pipe running from the cat, then to 2 mufflers? Just thinking out loud. Thanks for any replies.
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Old 12-31-2004, 01:47 AM   #2 (permalink)
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It wouldn't be a true dual exhaust... but you could do it. For it to be a true dual you would have to have one bank for each exhaust.
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Old 12-31-2004, 10:22 AM   #3 (permalink)
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you can. the best way would be to hook on a T pipe after the cat and use 2 mufflers. Then 1 pipe out of each muffler to either dump out the side or back of the truck. Alot of people on here use flowmaster 40 and 50, or borla mufflers.

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Old 12-31-2004, 11:15 AM   #4 (permalink)
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That would not be true duals. You cannot have true duals on our 4 cylinder. It simply can't be done. There is only one manifold.
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Old 12-31-2004, 11:41 AM   #5 (permalink)
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Quote:
Originally Posted by black93DX
That would not be true duals. You cannot have true duals on our 4 cylinder. It simply can't be done. There is only one manifold.


agreed
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Old 12-31-2004, 12:48 PM   #6 (permalink)
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Performance wise, is it best to just keep a single exhaust or dual on a 4 cylinder?
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Old 12-31-2004, 01:11 PM   #7 (permalink)
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The best performance wise would be buy a bolt-up cat-back system OR run custom 2 1/4 inch pipes(no larger) through a good muffler to a 2 1/2 tip. That would give you the best combination of HP and TQ.
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Old 12-31-2004, 04:24 PM   #8 (permalink)
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Quote:
Originally Posted by black93DX
You cannot have true duals on our 4 cylinder. It simply can't be done. There is only one manifold.
not true, anything can be done. a custom header could be made to have 2 cylinders each feeding into their own muffler. it would be expensive and a waste, but it could be done

it would be a waste to do anything more than a single in/dual out muffler. you would end up loosing alot more than you would gain. just throw on some headers and get a cat-back system.
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Old 12-31-2004, 07:30 PM   #9 (permalink)
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Could someone explain to me what a "cat-back" system is? Is it just a high flow cat?
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Old 12-31-2004, 07:35 PM   #10 (permalink)
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Quote:
Originally Posted by Jonathan86
Could someone explain to me what a "cat-back" system is? Is it just a high flow cat?
cat-back just means that you are changing the exhaust system from the catalytic converter back. this is the most common way because you dont have to worry about messing with your cat and screwing up the O2 sensors or emissions problems. and as long as your cat is in good condition and you are naturally aspirated or not heavily modded in the engine department, the factory cat is more than enough
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Old 12-31-2004, 08:37 PM   #11 (permalink)
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Quote:
Originally Posted by amber00dak
cat-back just means that you are changing the exhaust system from the catalytic converter back. this is the most common way because you dont have to worry about messing with your cat and screwing up the O2 sensors or emissions problems. and as long as your cat is in good condition and you are naturally aspirated or not heavily modded in the engine department, the factory cat is more than enough
So when you say "cat-back," your changing the headers? Or are you changing the muffler? I've got a Flowmaster Series 40. I think it might be time for a new cat though - probably a high flow cat. I'm going to be looking into LCE headers as well.
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Old 12-31-2004, 08:59 PM   #12 (permalink)
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Quote:
Originally Posted by Jonathan86
So when you say "cat-back," your changing the headers?
not unless you have headers hanging off your tailpipe

Quote:
Originally Posted by Jonathan86
Or are you changing the muffler? I've got a Flowmaster Series 40. I think it might be time for a new cat though - probably a high flow cat. I'm going to be looking into LCE headers as well.
if you look at a view of an exhaust system, you have the manifold (or header), the catalytic converter, and the muffler. the components go in that order from the front of the truck to the back. so cat-back means your swapping out the system from after the catalytic converter and back. if you just change the muffler, but keep the stock piping....that isnt a cat-back system. its just a muffler swap.

a high flow cat would be a waste unless you are running a S/C or turbo or have a heavily modded engine. a stock replacement would be more than adequate. besides, you will probly have too much flow if you run the high flow cat with headers and you would loose power

Last edited by amber00dak; 12-31-2004 at 09:43 PM.
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Old 12-31-2004, 09:10 PM   #13 (permalink)
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So your saying a "cat-back" is swaping out the cat, piping, and muffler for better performing parts?
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Old 12-31-2004, 09:45 PM   #14 (permalink)
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Quote:
Originally Posted by Jonathan86
So your saying a "cat-back" is swaping out the cat, piping, and muffler for better performing parts?
no, everything after the cat is removed and replaced. the cat isnt touched
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Old 12-31-2004, 09:53 PM   #15 (permalink)
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So just piping and a muffler?
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