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SLP Dual Dual Exhaust - restrictive?

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Old 06-06-2003, 03:55 PM
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Default SLP Dual Dual Exhaust - restrictive?

I was under my car and I noticed the part of the I tube that goes over the rear axle is flattened - I assume for clearance. I went out to Thunder to look at some other exhaust systems and none have their I pipe smashed. This would see like a huge restriction and negate the purpose of having a 3" I pipe every where else. Any feelings on this - am i off base?
Old 06-06-2003, 10:32 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

its flattened, but inside area is the same(think squeezing a circle to an oval, same area, just different shape)... since its a "factory" exhaust, they probably do that to make sure it doesn't bang the axle... for being quiet, its one of the best flowing exhausts...
Old 06-06-2003, 11:47 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

I have it, and it flows pretty damn well. I only gained a few ponies with the cutout open.
Old 06-08-2003, 12:01 AM
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Default Re: SLP Dual Dual Exhaust - restrictive?

The flow is not supposed to be restricted by SLP's use of the oval tubing in that area. Not worth much in the HP department if it is though...unless you have big Hp or big cubes. (450 plus in either)
Old 06-08-2003, 01:40 AM
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Default Re: SLP Dual Dual Exhaust - restrictive?

Have it also and it seems to out flow my hooker on the dyno
Old 06-08-2003, 09:57 AM
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Default Re: SLP Dual Dual Exhaust - restrictive?

i would also like to hear some dyno results. i have never dynoed mine open vs. closed. anyone? i have heard (but not seen) that there is only a few rwhp difference b/w the cutout and the full dual/dual even on bigger cam higher rpm combos like mine.
Old 06-08-2003, 11:29 AM
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Default Re: SLP Dual Dual Exhaust - restrictive?

Generally speaking, SLP did a pretty good job with this exhaust. It is decievingly quiet for a performer.
Old 06-08-2003, 05:08 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

Made a few dyno pulls with the stock dual dual on my car, drove it 20', putr it on the rack and put a magnaflow on it. Backed it back on the dyno an hour later and it was exactly the same (with the cam ~365rwhp). I liked the dual/dual but it was just a bit too quiet. Tha magnaflow has a really nice sound but my neigbors preferred the dual/dual I'm sure
Old 06-08-2003, 06:15 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

Does the SLP PP "aftermarket" dual/dual outflow the SLP OEM dual/dual?
Old 06-08-2003, 07:06 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

Does the SLP PP "aftermarket" dual/dual outflow the SLP OEM dual/dual?
I would imagine the aftermarket is the same as the OE. I seen somewhere that they have a louder muffler on the newest aftermarket dual/duals now. Funny thing is the dual/dual on my car seemed louder then an OE dual/dual on a 2002 with the same cam/headers as mine so who knows..
Old 06-08-2003, 09:35 PM
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Default Re: SLP Dual Dual Exhaust - restrictive?

i have the dual dual on my 02 Firehawk with slp long tubes and cats. it is quit when cruising but when u lay on the gas and get over 3,500 rpm man does that dual dual come to life. best of both worlds in a sense..




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