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Old 02-13-2005, 08:19 PM   #1
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Well, as you may know I do beleive there is a leak somewhere in my exhaust system. I've considered fixing it for sometime, but now I have some money and I'm thinking of doing an overhaul to my exhaust system.

I've listened to Merlins 91 flowmaster 80 (GODLY) and sse1990'* magnaflow. I like them both - and they make me want to do this to my car. I was thinking about getting a high flow catalyst, a flowmaster 80 (or a magnaflow...havn't decided), and using the tips from an SSEi. How much would you think a job like this would cost with parts and labor if I go dual exhaust? Does dual add performance and sound, or is it more for looks? How much do you think the job would be without the dual?

I'm just thinking if it would be worth it or not for this car. It'* tranny is rebuilt and in good condition. The engine runs fine, but leaks a bit of oil. Other then that it'* in great shape.

Let me know what you guys think. If you guys have any more videos or sound clips it would be great if you could link me. And Merlin, do you have a video of your car idling?

Thanks
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Old 02-13-2005, 09:49 PM   #2
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Don't get dual, worthless on our cars. You'll want a 2.25" exhaust. Merlin'* '91 is the SWEETEST sounding car I have heard in a LONG time. I wouldn't get anything other than a Flowmaster [80 Series] for my car. Get any name brand high flow cat.. you'll be set with that along with some new tubing. The tubing is straight-forward. Wouldn't take long to fab one up. Just make sure the person doing the exhaust MANDERAL bends the tubing.. because crush bends are ****, and don't flow as well as the latter.


-justin
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Old 02-13-2005, 10:43 PM   #3
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I think I got dual exhaust confused with dual outlet. With dual exhaust there are two mufflers and two seperate pipes but with dual outlet there is one inlet pipe and the muffler divides that into two outlet pipes? Is that correct?

After reading some reviews of the flowmaster I am sold (and Merlins video helped ). I take it for the Bonne I should get a single inlet, dual outlet. Should the inlet and outlet size on the flowmaster be 2.25"?

I just ordered a new O2 sensor as well, and I think I'm going to do the rice pipe mod. When I'm done I think this setup is going to be pretty sick...

Oh, and what is involved with putting the tips on the end of the pipes? Is that something I can do myself?
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Old 02-14-2005, 12:53 AM   #4
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to put the tips on the new muffler I'm guessing you have to just weld the tips on or clamp them on (may look ugly if clamped on). Other than that i guess you MAY need to saw the muffler'* outlet so that your tips dont stick out too much (but that all depends on how long the muffler'* natural outlet is). That'* all i can thinkof,, i miss anything anyone?
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Old 02-14-2005, 01:16 AM   #5
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I'd say get some nice tips! The Double Outlet will be great on that car, I figure that the only cost difference is 1 welded pipe, and a second tip, and a lil more labor, for a much more authentic domestic look to go with the sound.
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Old 02-14-2005, 06:20 PM   #6
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I'll get some nice tips indeed. After looking at some flowmasters on the internet it seems the smallest size is 2.5". Does that sound right? Second...if my exhaust tubing is still in good shape and not rusted through, it should be ok to leave them (or at least just leave the longest sections before it gets to the muffler)? I'm going to get the high flow cat and flowmaster regardless - I just don't want to be spending too much at once...

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Old 02-14-2005, 09:05 PM   #7
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Yeah, you'll be fine.. but drop the exhaust an inspect it first.. it isn't tough. Two bolts on the rear header.. those are a BITCH to get off.. you need a CV-Joint socket to get it off.. and about 12" in extensions... not to mention a TON of strength. Once you get those bolts off, it is just two hangers.. each with two rubber band type things that hold it on.. they take a little manuevering to get off.. so just play around with them and they'll come off.

The dual outlet exhaust is the N10 muffler.. personally I would just have a single tip.. but it'* all up to you. If the smallest muffler diameter you can get is 2.5" then you must get an adaptor that converts the 2.25" to 2.5" and you will probably need to cut a little extra pipe off. Are you planning on doing this yourself or is a shop doing it?


-justin
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Old 02-14-2005, 10:27 PM   #8
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I'm most likely going to get this done at a shop. I think I will just start off with the muffler and the extra piping after the muffler, and get the cat done at a later date. I always hate blowing all my money when I get it...I think I'm going to take it one step at time.

Also: Is there any problems buying used mufflers? Such as one like this. They are a helluva lot cheaper...
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Old 02-15-2005, 02:36 AM   #9
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I'm going through an exhaust replacement as well. Our cars (SSE'*) are 2.25" with Dual output mufflers to the right side. The Cat is 4 inches tall, body of 14", and length of 16". The muffler is 18" body, 28" length, and 5" tall. All measurements were accurately taken while on my back in the driveway with a money tape measure.

GM Part numbers

Cat - 25100635 $743.00
Muffler - 25528696 (25552824) $??? Discontinued???
Intermediate pipe - 25552819 (25533276) $166.00

Anywho, I just got a quote from a speed shop. I'm going to 2.5" Magnaflow Cat, and Muffler. And bending new pipes. All stainless steel. $659. About $550 for non stainless. I'm going get some more quotes this weekeend.

Hope it helps.
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Old 02-15-2005, 10:30 AM   #10
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That does help alot. Thats alot of money. Is the muffler welded into the system, or is it all just clamped together? I think I'm just going to get the muffler first and try to just incorperate it into the existing system. Is that something I can do myself, or does it require some special tools to get apart?
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