True Dual

[DOSWS62002]

Ok so I want a whole true dual custom exhaust on my car. I live in freehold, monmouth county. Does anyone know a good place to go near me, id go far but closer is better.

Also i was going to buy hooker supercomp headers but. since id be getting all new from the headers back would i not be able to keep my loudmouth muffler that i have, or do i need to get another muffler.....one for each side? i dont really know what to do with this so any help from you guys would be very awesome! Thank You

[LTb1ow]

Other than the loud factor of having true duals, why do you want em?

Unless you are making a really ungodly number at the crank, there is no real practical need for them.

[MonmouthCtyAntz]

Ok so I want a whole true dual custom exhaust on my car. I live in freehold, monmouth county. Does anyone know a good place to go near me, id go far but closer is better.

Also i was going to buy hooker supercomp headers but. since id be getting all new from the headers back would i not be able to keep my loudmouth muffler that i have, or do i need to get another muffler.....one for each side? i dont really know what to do with this so any help from you guys would be very awesome! Thank You

Texas speed makes a pretty nice true dual setup...by you im not sure, no one I could reccomend...I know mieneke makes custom systems,you just have to find the right ones that gearheads run.

[BonzoHansen]

I'd make sure all the bends are mandrel bent or it is probably counter productive.

I agree with SNM it is likely overkill for 99% of street cars, espc since places like mufflex make 3.5 and 4" systems. I think NJSpeeder has a 3.5" mufflex system

[LTb1ow]

http://i248.photobucket.com/albums/gg166/jmmullin/Vehicles/exhaust/Exhaust2.jpg

If you must....

[KirkEvil]

If your just looking for louder, install the headers with your LM1. You will not see much performance gain replacing the LM1 with TDs at a bolt on level.

If your deadset on true duals go with TSP. Do not use 2 LM resonators in a true dual setup, look at the sweet thunders or spiralflow. Also, keep in mind that TDs will dump, so unless you are going to hang fake tips in the back, your WS6 will look incomplete

[LTb1ow]

Orly?
http://xhausted.com/01%20TransAm%20duals%20S1.JPG

[BonzoHansen]

Whose car is that? Looks like a ground clearance issue with no real benefit.

[7pointoh]

I have TD's dumped before the axle with Hooker Supercomp headers. Just get a headers and a Y-pipe and you should be good. Custom TD's and you'll be paying a lot. It's not worth it for the sound. TexasSpeed makes the rumbler x system but you still have to custom it to dump out back.

[BonzoHansen]

Be aware you will most likely fail inspection with pre-axle dumps.

[Batman]

Bassani has a nice looking true dual set-up now as well, pricey though, around $1000.00. Not really worth the effort IMO unless you are pushing 1000+ HP

http://pi.b5z.net/i/u/509876/i/bassani-installed-complete_ezr.jpg

[NJSPEEDER]

A single full tail pipe 3.5 with a proper y-pipe moves as much air as a short dual 2.5 system.

Packaging on 3rd and 4th gens is just tough with true duals. You lose a ton of ground clearance especially if you are trying to squeeze tail pipes out of the set up.

[7pointoh]

I'm happy with my TD's but I regret not saving up for a GMMG. The 3 inch TD setup gives me ground clearance issues. I'm not lowered but I run 30 tires which means I scrap the going over speed bumps never had that issues with a Y pipe setup.

[WildBillyT]

A single full tail pipe 3.5 with a proper y-pipe moves as much air as a short dual 2.5 system.

Packaging on 3rd and 4th gens is just tough with true duals. You lose a ton of ground clearance especially if you are trying to squeeze tail pipes out of the set up.

Yeah, I saw a nice TD setup using oval tubing so they didn't lose ground clearance. Nice, but it was a stupendously expensive setup from what I can tell.

[sweetbmxrider]

just get a cutout :nod:

[LTb1ow]

Two cutouts!

[NJSPEEDER]

Yeah, I saw a nice TD setup using oval tubing so they didn't lose ground clearance. Nice, but it was a stupendously expensive setup from what I can tell.

The rule of thumb for oval tubing is to take the cost of the equivalent size stainless tube and double the price.

[NJSPEEDER]

just get a cutout :nod:

98T/ADriver. He dyno'ed his car back to back a few years ago, cut out closed and then open. Opening the cut out was only worth 1 or 2 hp at peak and nothing across most of the rev range. Cut outs are really not all the help they are cracked up to be. If anyone gets a big gain from opening a cut out, it really means that they have a **** exhaust on the car.

[sweetbmxrider]

98T/ADriver. He dyno'ed his car back to back a few years ago, cut out closed and then open. Opening the cut out was only worth 1 or 2 hp at peak and nothing across most of the rev range. Cut outs are really not all the help they are cracked up to be. If anyone gets a big gain from opening a cut out, it really means that they have a **** exhaust on the car.

:lol: he also lost what, 50 hp from last year?

i completely disagree with you. but i guess we can use one example that clearly had issues as the determining factor :-P

[LTb1ow]

The arguement of cutouts brings forth the great arguement of back pressure. Solve that one and you get your answer for cutouts.

[sweetbmxrider]

with a cutout, you will still have backpressure :shrug:

[LTb1ow]

How? A 3" cutout right in the Y pipe would kill any backpressure.

[sweetbmxrider]

i was thinkin I - pipe that would still allow exhaust to flow back to the muffler and create some backpressure. also keeping cats would create some back pressure.

[NJSPEEDER]

Worry about not having back pressure when you are running top fueler zoomie headers. Until then, just put an exhaust system on that is a logical match to the amount of hot air the engine is trying to pump out.

The back pressure thing always gives me a laugh. Another myth from the internet about where power comes from.

[WildBillyT]

How? A 3" cutout right in the Y pipe would kill any backpressure.

Well, if you have an electric cutout or 2 you now have butterfly valves in the way.

[JL8Jeff]

True duals out the rear aren't really worth the hassle and cost and loss of ground clearance if you go under the axle. True duals with dumps won't pass inspection either. But if you really want to make the effort, here's a setup done on a 4th gen with Sweet Thunder chambered mufflers. The Bassani is expensive but at least it's stainless so the cost is more justifiable.

http://www.sweet-thunder.com/images/testimonials/13.jpg

[sweetbmxrider]

:drool: i'd opt for gmmg mufflers and their tips but nice bends!

[WildBillyT]

:drool: i'd opt for gmmg mufflers and their tips but nice bends!

I don't think too many companies make chambered mufflers even though many of them sell them with their name on them. Sound is probably the same all else being equal.

[NJ Torque]

No need.

[LTb1ow]

B&B triflow!

[BlackBADaSS02]

I have the Basanni TD system. It sounds good at WOT, but there are a couple things I'm dissappointed in. I have a rattle in the rear of the exhaust, it is either where the pipes come over the axle because they are so close to each other, or it is coming from where the pipe passes close to the upper panhard rod brace bar. The other thing I dont care for is how the pipes are at the back. The tail pipes point down slightly, and I don't like how it looks.

If I could do my exhaust over again, I would just go with a Y pipe and catback. I'd probably go with the GMMG exhaust. I think I would also go with Kooks headers instead of QTP's. QTP's are really nice, and a good bargain for a stainless header, but the fitment is not great. My passenger side primary is against the frame rail.

[JerzLT1]

also cant run a Chassis mounted TQ arm, thats the issue im running into now

[Tru2Chevy]

Motor vehicle code in NJ states that the exhaust must exit at the rear or side of the vehicle at least 4" behind the last window that can be rolled down. Keep that in mind when planning your exhaust setup.

- Justin

[Batman]

To backtrack to the cut-out I also did back to back runs when I had my dual cut-outs. The cut-outs closed with Magnaflow exhaust beat the cut-out open by at least 10HP to 3900RPM, then the cut-outs open peaked a whole 2 HP higher. That was also backed up at the track by a loss of .2 and 3 MPH with the cut-outs open Vs closed, and this was on a heads/cam car making over 500 at the flywheel. I think on a pure race car with stupid power you may see a gain but for your set-up just get a good cat-back/Y-pipe and be done.