Tin Indian

Most people already know that the SLP dual/dual cat-back flows very very well for a stock location exhaust system. In fact, it may just be the one of the best bolt-on "stock type" flowing systems avail. However, many won't purchase it because it's too quiet.

Well, the dual/dual is music to the ears when used with a set of long tube headers. I have the SLP dual/dual exhaust system with FLP LTs and the FLP cats, so I can't comment how it will sound without cats. I may one day install the off-road pipes just to see how it sounds without cats, but I can tell you, the system has a real nice sound with cats. And, I would bet that it would not have an noticeable rasp without the cats.

Has anyone tried the dual/dual [no-cat] Long Tube setup here?

I'm happy; I knew this quiet dual/dual system would really shine once I put the headers/cam/heads combo on the car! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Ron,

Tin Indian

Just my opinion, but I doudt you will loose any..

Scalpel

iTrader: (4)

I have an MTI 427 CID, Dynatech Stepped Headers to a cat less 3.5 Y-Pipe going through the SLP dual/dual. No rasp whatsoever, no drone, very smooth.

bo0oost

I have heads and cam with a 4" mufflex and spintech. It's sooo damn loud. I also have a SLP Dual Dual laying around... I wonder if I put it back on, how much horsepower i'll lose.

gator's 99TA

iTrader: (2)

i have it on my LT header and no cats and i like it. now it isnt gonna get the attention the wide open muffler guys will but i know it makes the power. you have to listen to mine to hear the cam from anther car but out back it is nice and smooth.

cendres

iTrader: (2)

As an aside: Has anyone figured out a way to make the muffler, tailpipes and tips look presentable on these systems? I really like the design and sound, but man does that 400-series stainless look like ***...

HITMANSS

I am probably one of the only guys in the country who has taken steps to quiet down an SLP dual-dual! When I got my HP up around 360, I started to notice a rasp when I downshifted or backed off the throttle at higher RPMs. I had an 18" Dynomax bullet welded into the I-pipe, & the rasp went away. <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Hyper SS

The SLP dual dual is seriously underrated for performance. Maybe it's too quiet for cars with stock exhaust but when you start adding H/C headers, off road Y's and such it does come into it's own for toning the exhaust note down. Most people with H/C wouldn't want it because they think it'll restrict the performance somewhat (most will) but it's music to your ears to just sometimes listen to the radio.

You can have the best of boths worlds if you buy a electric cutout!

bo0oost

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CANNIBAL:
<strong> I have an MTI 427 CID, Dynatech Stepped Headers to a cat less 3.5 Y-Pipe going through the SLP dual/dual. No rasp whatsoever, no drone, very smooth. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Any dyno numbers?

I'm seriously considering now putting the dual/dual on my car in replacement for the mufflex 4" with spintech.

I'm scared of losing hp, but it would be damn nice to have a quiet car !

HOSS99

I have a similiar setup on my car. Love it, pretty tame when cruising, and has a nice roar @ WOT. SLP LT's, CATS, Factory Dual/Dual, MTI B1.
I'm curious if I'm losing power with the Factory Dual/Dual, and should switch to the Aftermarket Dual/Dual? Any Opinions?

gator's 99TA

iTrader: (2)

no difference b/w factory and aftermarket dual/dual catback. many dynos have shown there is less than 5 rwhp differnce b/w open cutout and full muffler here on head and cam motors. less with bolt on cars.

HOSS99

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by gator's 99TA:
<strong> no difference b/w factory and aftermarket dual/dual catback. many dynos have shown there is less than 5 rwhp differnce b/w open cutout and full muffler here on head and cam motors. less with bolt on cars. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Thanks! <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

Jims 98 Z28

How would the dual/dual compare to the SLP 2OTL? I would figure that the 2OTL would flow a little better being the same basic design, but with a smaller muffler and less turns for the exhaust to make. Anyone have any thoughts on this?

2000LS1Z28

I've heard the dual/dual(any many other set-ups) and it is the least raspiest sounding cat-back I've heard yet on an LS1. In fact, if there was rasp, I didn't really hear any. For some reason, that SLP muffler does a nice job of smoothing out the tone of off-road pipes.

Mike

Scalpel

iTrader: (4)

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by bo0oost:
<strong> </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by CANNIBAL:
<strong> I have an MTI 427 CID, Dynatech Stepped Headers to a cat less 3.5 Y-Pipe going through the SLP dual/dual. No rasp whatsoever, no drone, very smooth. </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Any dyno numbers?

I'm seriously considering now putting the dual/dual on my car in replacement for the mufflex 4" with spintech.

I'm scared of losing hp, but it would be damn nice to have a quiet car ! </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">There is about a 15 RWHP difference with cutout open vs through the SLP dual dual on my car.

gator's 99TA

iTrader: (2)

canibal, your 427" motor also makes well over 550 HP at the motor with lots of compression and tons of velocity. 15 RWHP is NOT the norm at all with simple bolt on or even cammed 346" motors.

boos2

The SLP dual/dual has been dyno proven to be one of the best flowing mufflers out there. Flows almost as well as cutout. Sounds great too. The only downside I have heard of (other than the tips) has been it is heavy. I have considered dropping my Borla for the dual/dual.

Mike