NASCAR style dual exhaust??

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NASCAR style dual exhaust??

October 08, 2006, 01:46:21 AM

ok, i need to know if this is BS or not. i was asking my mechanic today about putting dual exhaust on my Cougar. He suggested that instead of running the exhaust down each side under the car, that i have them run both down the same path as the factory single( one over the other) and have them separate at the rear of the vehicle. he said that it was the way NASCAR does it. i have never heard of this before, and he said both ppes would fit in the same channel and it would avoid having to move the fuel filter and messing with anything else that would get in the way.

NASCAR style dual exhaust??

Reply #1 – October 08, 2006, 08:57:37 AM

Yeah, the way NASCAR does it ( or atleast used to do it not too long ago), the pipes came off the headers and met on one side. I believe they met up after they passed the transmission. They ran side by side(not one on top of the other) and then split off one out each side of the car or both out the same side.
Sorry, trying to find a good picture but I can't find one.

In theory, it sounds like it would work however, I'm not too sure about it.

NASCAR style dual exhaust??

Reply #2 – October 08, 2006, 09:42:41 AM

Take the pipes out the back.

NASCAR style dual exhaust??

Reply #3 – October 08, 2006, 10:18:31 AM

i'v seen it done a couple times, as long as there arnt to many restrictive bends, what ever fits usualy works. just dont want anything hanging to low and sing on the ground, or bumping into control arms or drive shafts. if he's willing to put in the work for you, i'd say try it. lots of them exhaust shop guys wount even do that.

NASCAR style dual exhaust??

Reply #4 – October 08, 2006, 09:38:11 PM

I was thinking about putting dual exhaust on my dodge dump truck and running the pipes together would be the only way to do it because of the large gas tank. However for your Cougar, if you getting a custom bent system I would just let the mechanic do whatever is easiest for him as long as you get a true dual exhaust. Do you have the dual hump cross member? And would you be able to get the catalytic converters to fit.

NASCAR style dual exhaust??

Reply #5 – October 08, 2006, 10:05:09 PM

i personally would stick to something more traditional but thats me. the ONLY way i would ever run any sort of side exaust is if it was integrated into a side skirt. they look ghetto/hillbilly/hick/redneck otherwise, like if the pipes just stick out the side.

anyway, thats my opinion. now, if you actually have it done than probably the most important thing would be to watch clearances. remember that axle moves up and down and the driveshaft right along with it. even if its not much. ground clearance too. if you have subframe connectors, i wouldnt let them droop any more than those. obviously, if your guy is custom exaust guy he should already know that.

finally, it sounds like he wants you to run str8 pipes all the way back. if you can get away with no cats than i guess thats okay. my car kind of stunk withought them. also consider though the ballance tube is normally there in a true dual exaust. id make sure you at least install some tubular headers. i wouldnt mess around with the stock cast manifolds. they will change the tone a little, are lighter, look and flow better. are you going to run lers?

NASCAR style dual exhaust??

Reply #6 – October 08, 2006, 10:07:11 PM

On a lot of trucks, when they run duals they'll run one pipe over the other but that's just because they have the ground clearance to do it (and can usually put it inside the frame).

I don't think there's the clearance needed under a car to do it though.

Also I've never known of nascar to run the pipes on top of each other...they still run an H-pipe, then the pipes go side by side (and transition into oval tubing) and it goes out one side of the car.

NASCAR style dual exhaust??

Reply #7 – October 09, 2006, 10:03:15 AM

it could be that i misunderstood the pplacement of the pipes, as far as side by side opposed to over/under. i don't believe i will do this type anyway, probably a more conventional dual. i have to run cats and lers, any suggestions on what kind of lers to use? i want a good, deep sound, but i don't want it loud( i don't want to attract the wrong attention). i thought about flowmasters, i saw some called "purple randys" i thought about getting them just because of the name!

NASCAR style dual exhaust??

Reply #8 – October 09, 2006, 10:54:03 AM

I run a standard Mustang 2 1/2" cat H-pipe (FMS shorties feed it), followed by a 2 1/2" cat-back comprised of FlowTech flow-tubes attached to 18" Magnaflow lers (to make up for the 4" difference in wheelbase), followed by polished stainless Flowmaster Mustang LX tailpipes & 3" diameter x 13" long Flowmaster polished stainless tips to extend the tailpipes to the rear bumper. It looks good & is nice & quiet while cruising but really sounds nasty when I get on it.

As you can see, you could use tips as long as 16" or so, though I think these look good from behind.

Let me know if you are interested in part numbers...

NASCAR style dual exhaust??

Reply #9 – October 09, 2006, 11:38:58 AM

yeah, that looks just right for what i want. thanks for the input!