Instead of going through the process of installing a double hump cross-member, why not use a large single exhaust pipe - maybe 4 inches - and have it branch off into two mufflers?
Single Pipe Exhaust Question
- Thread starter blizack
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well if ya have it going 2 to 1, why not just keep the one and save some weight and a muffler? idk, im just bored at werk.
well, i was thinking that it would probably be easier to find two mufflers with smaller inlets than one muffler with a big 4 inch inlet.
On a lower performance engine, you can. You need to match the flow requirements of the engine with the exhaust. If you have a stock engine, then you don't need the flow rate of dual 2.5" pipes. Plus, you also have to look at the rpm the engine lives at. A stock 350 cruising at 1800 rpm won't need as much flow as that same 350 at 7000 rpm.
You can make it as scientific as you want, but most true street engines don't need dual 3" exhaust.
You can make it as scientific as you want, but most true street engines don't need dual 3" exhaust.
I run a 3 in single cat and it is not a big restriction, but my crappy Y pipe is. GM used 3 in singles on some 300+ hp cars, so it should be fine if you are making south of 400hp.
I considered a single 3" for a while, but after figuring the cost of putting a system together it was going to cost more to have a shop make one from mild steel than to buy a 2½" Pypes system with an x-pipe. I bought a section of 3"x4" 1/8" steel, did some cutting, had it welded, and now have my own dual-hump crossmember.
Ok. This all makes sense then. It would make sense to have a single pipe setup but the availability of the parts would probably make it cheaper to buy a dual setup. Although most cars wouldn't require the benefits of a dual setup.
85 Cutlass Brougham, instead of having a Y-pipe would you consider having a single muffler with dual outlets?
85 Cutlass Brougham, instead of having a Y-pipe would you consider having a single muffler with dual outlets?
The y-pipe he's refering to is off the left bank and right bank of the engine into a single pipe rearwards.
I've also ran both pipes of a dual setup over to the passenger side if you don't have a double-hump crossmember.
I've also ran both pipes of a dual setup over to the passenger side if you don't have a double-hump crossmember.
When I did my swap in 1997, I bought a cat back exhaust for a Monte SS from Dynomax, as well as a cat forward with Y pipe setup from Edelbrock. Don't get the Dynomax kit as the Y pipe they give you is poorly designed. For the cat, it was the only thing that did not just bolt on. I had to have that installed by an exhaust shop.
That's something else I hadn't mentioned. You can do a factory-style single setup, but if your engine makes a decent amount of power (300+hp imo) it would probably be better to go with a set of headers and an x-pipe style system. Pypes also has a stainless version of the Monte-style system if you want to give it a try though... and if you don't have emissions in your area you could get a pipe to in place of the converter.
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