SLP lm1 catback system vs. straight pipes after stock cats - Pontiac GTO Forum
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post #1 of 7 (permalink) Old 11-10-2012, 01:48 PM Thread Starter
 
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SLP lm1 catback system vs. straight pipes after stock cats

Other than a CAI my 05 gto is stock. What is the difference in sound and performance between the SLP lm1 catback system and x-pipe with muffler delete or completey straight piped form the stock cats. Is there anything unique with the SLP lm1 catback system or is it just a waste of $700? Also for any of you that have the SLP lm1 catback system could you give your review on them, like if the interior drone is tolerable if it exist at all. Thank you i am new to this forum site.
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post #2 of 7 (permalink) Old 11-10-2012, 04:17 PM
 
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I have the muffler delete on mine and can not wait to put a "real" exhaust on it. I rolled up on a 04 the other day and we were reving back and forth for fun. he hsaid he had the LM1 and it sounded freaking excellent. waaaay better than mine.
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post #3 of 7 (permalink) Old 11-13-2012, 11:51 AM
 
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Not a fan of the LMs or straight pipes on the GTO.

2003 Corvette Z06 - MGW shifter, Corsa X pipe, Corsa Xtreme exhaust, Texas Speed long tubes w/o cats, PowerStop rotors/pads, Conti DWS tires, C6Z51 F&R sways, C5R headlights, tuned

04 GTO - sold
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post #4 of 7 (permalink) Old 11-13-2012, 01:56 PM
 
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I have jba shorties with stock cats x pipe and lm2 and it sounds real nice and i get compliments all the time but my buddy has the lm1 and i plan on switching to lm1 the straight pipes dont sound as clean either...
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post #5 of 7 (permalink) Old 11-15-2012, 11:04 AM
 
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Originally Posted by 05YellowDevil View Post
I have jba shorties with stock cats x pipe and lm2 and it sounds real nice and i get compliments all the time but my buddy has the lm1 and i plan on switching to lm1 the straight pipes dont sound as clean either...
I have a similar set up. Shorties stock mids to x then lm1, was thinking about going to lm2 to reduce interior drone... Is there much drone with your set up with the lm2 resonators? I also am thinking about swapping the x to an h to give it a deeper tone.
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post #6 of 7 (permalink) Old 11-20-2012, 03:23 PM
 
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You'd get a different sound for sure but you'd gain next to nothing in power. You need to change the midpipes out at minimum. LTs for the best exhaust power add.

Current: MGW-p, H-pipe, SS OTRCAI, Lovell rear springs, Eliminator shocks and Pioneer AVH-P3300BT, JBA LTs+catless mids, Drilled/Slotted rotors, Kooks Afterburners, catch can & Tune Next: ??? Wish list: Intake & TB, modest cam, UDP, gears
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post #7 of 7 (permalink) Old 12-06-2012, 10:01 AM
 
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Originally Posted by Mddrummer911 View Post
I have a similar set up. Shorties stock mids to x then lm1, was thinking about going to lm2 to reduce interior drone... Is there much drone with your set up with the lm2 resonators? I also am thinking about swapping the x to an h to give it a deeper tone.
No there is not much drone at all and i dont have a very deep tone at all... It has a nice light tone but honestly it doesn't impress me much I'm 23 I've had a few old school muscle cars before the GTO and I had basically straight pipes on those cars and I miss the loud rumble and waking up neighborhoods haha
Mine isn't a daily driver either so I don't have to listen to it everyday but I am planning on opening up this LS2 with a big cam, heads, im thinking of redoing the whole exhaust starting with LTs and i haven't fully decided what mufflers i want to finish with
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