Anyone fabbed there own true dual exhaust? Ground clearance? Or stick with single?

[fullforce]

Just pondering a few ideas right now, I plan to build my own exhaust system (other than the headers). And I am serously considering doing a true dual setup.
My only concern is ground clearnace, running both 2.5" pipes side by side how much ground clearnce is actually left with a lowered car? I plan to drop it about 1.5"
Also if anyone has done this and it just want worth it over staying with a single pipe let me know.

[Injuneer]

One approach - AS&M mid-lengths, modified to allow the driver side to go straight back, extensions on collectors, 3" Borla XR-1 mufflers, 3" pipe with turndown. Not driven much on the street, so I've never run into issues with speed bumps. Passenger side muffler is in the pocket for the stock cat. Driver side muffler is the potential issue.

[shownomercy]

I would save your money and run a single with a nice flowing muffler. If you want all out, toss a cutout inline and you have best of both worlds.

Add up money and weight, bet the duals are not logical at your level.

All that aside, duals will sound nice if you get good muffler. :lol:

[SSlowBoat]

Just pondering a few ideas right now, I plan to build my own exhaust system (other than the headers). And I am serously considering doing a true dual setup.
My only concern is ground clearnace, running both 2.5" pipes side by side how much ground clearnce is actually left with a lowered car? I plan to drop it about 1.5"
Also if anyone has done this and it just want worth it over staying with a single pipe let me know.
Tried that once, couldn't make it down my driveway. Better off running 3" catless y pipe to single 3.5 or 4" mufflex style, or just buy the kooks true dual

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[fullforce]

I know I don't need and probably never will need the flow, just doing it for sound mainly. I was looking into the hooked dual exaust and maybe doing a copy of that but I don't know if it will be worth it. I guess I should stop wanting my car to sound like a corvette lol

[agenthol302]

personally I would do a single with a cutout

[harner]

Your car will never sound like a Corvette. I've seen many true dual builds on that "other" tech site, some went over the rear axle, some went under it. I'm sure they sound good and building it yourself will make you happy. Just do whatever makes you proud and is appealing to your ears.

Personally, I agree with shownomercy - you'll save a lot of money just running a quality catback and Y pipe setup. I went with a Pypes catback, because I am tired of the same old Magnaflows, LM1/LM2, and Borlas in the world. It's raspy and obnoxious, but quality and built by a shop a little over an hour away from my house. I have about $1000 into my current exhaust setup, including a Doug's cutout. A simple cutout and decent catback (with tips included & no cutout) could potentially lower that significantly, especially if you can score a used system.

If you saw my CTS-V thread in the LSX Discussion subforum, you'll know that I have almost as much into my chinese headers as I do in my entire American-made 4th gen exhaust. :)

[agenthol302]

I wonder how spintechs would sound. I loved em on my GTO

[harner]

Check YouTube, I'm sure it's been done already and will sound good.

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[Injuneer]

I ran a custom 3"-->4" Y-pipe, and a Mufflex 4" intermediate pipe, with the Flowmaster Race-Series single 4" in/single 4" out. After installing the Gear Vendors O/D the Y-pipe no longer fit. Removed the Mufflex cat-back, and installed the simple 3" straight pipes shown above. Saved about 40#. Interesting, dyno checked before and after, and no significant change in HP. Mufflex catback is great, but heavy.

Cut-outs can be a problem. Not sure if they still do it, but when I last raced at Englishtown, they would not permit open exhaust, except on Sundays. No cut-outs allowed. Had to have a muffler, and had to pass a dB meter check in tech, and on the track under full power. SLP held an annual customer appreciation event there, renting the track for Saturday, and when SLP took their LS1 test-mule out on the track with the cut-outs open, they were thrown off the track for exceeding noise limits. My Borla XR-1's were originally deemed legal (with a bit of head shaking/eye rolling by the tech inspector). But then they upped the rule to require that the muffler(s) have at least 4 baffles. No more trips to Englishtown.

[ksmyss]

I have built a few dual setups and had one for a while. I got tired of the drone in the car with it dumped at the rear axle. I now have a custom dual 3" into 4" flow master merge, single 4" out the back with a single 4" in/out Hooker Maxflow muffler. It is pretty tame at idle and under part throttle but once you open it up it gets loud.