I have an 04 GTO with Dynatech long tubes with high flow cats, x-pipe and SLP Loud Mouth 1(This is what came with the 421 bobcat kit). This whole exhaust setup is extremely loud and when I rev it up or when I'm cruising and let off the gas it just crackles and pops and I love the attention I get at the car shows or when I'm driving the car. Last Hooters car show I went to there was an 06 GTO on the dyno with full SLP exhaust. Car was just about as loud as mine, while on the dyno after the pull when he let off the gas there was no crackle or popping at all. I have seen many videos of 05 and 06 with SLP exhaust none crackle or pop. 04 SLP exhuast is alittle different from from the 05-06 SLP exhaust: This the 05-06 Slp exhaust-http://www.pfyc.com/pc/GT5015/GTEXH/SLP+Loud+Mouth+Exhaust+System+w-PowerFlo-X+Crossover+Pipe+-+2005%2B+GTO.html
The mufflers are right after the x-pipe on the 04 while on the 05 the mufflers are towards the end of the exhaust. Could this have alot to do with the difference? I know it also depends on what long tubes and x-pipe are being used.
Also does anyone have an exhaust that might sound similar to mine?
I have a setup almost like your i have kooks 1 3/4" jethot coated to 2200 catless mids on the slp catback system(current dd i have lmII's on). the poping and crackle can be taken care of with a tune, If im not mistaken it is due to the excess gas release from the computer trying to make the car run smooth. the excess gets dumped on decel to try to correct that thus causing the popin and crackle. Im not sure on the positioning of the resonators and how that plays a roll im sure you will have someone chime in and help you out.
I have a setup almost like your i have kooks 1 3/4" jethot coated to 2200 catless mids on the slp catback system(current dd i have lmII's on). the poping and crackle can be taken care of with a tune, If im not mistaken it is due to the excess gas release from the computer trying to make the car run smooth. the excess gets dumped on decel to try to correct that thus causing the popin and crackle. Im not sure on the positioning of the resonators and how that plays a roll im sure you will have someone chime in and help you out.
The car was professionally tuned on a dyno and put down 360rwhp. The exhuast system is basically like straight pipes. Theres no restriction what so ever and I love the crackle and popping. I was just wondering why heard it on some 04s and not on 05-06s with Slp
due to the tune is why you dont hear it. when the tuner goes into the computer he adjusts the A/F ratios so it eliminates it.. 04's have a different pipeing route for the exhaust so that plays somewhat of a role.
I have an 06-m6 with LM1 and a tune. It's rather obnoxious, pops and snaps, especially when cold. Under hard acccelleration it just screams murder. I like it and it's one of the reasons I went with the LM1. SLP longtubes to follow for Christmas... There are many other options if a more mellow or european sound is desired. LMII are a little softer on the ears...
I have an 06-m6 with LM1 and a tune. It's rather obnoxious, pops and snaps, especially when cold. Under hard acccelleration it just screams murder. I like it and it's one of the reasons I went with the LM1. SLP longtubes to follow for Christmas... There are many other options if a more mellow or european sound is desired. LMII are a little softer on the ears...
Those long tubes are really gona wake it up even more and wait till you hear it scream when you put those on , Its also gona crackle and pop really loud. At 3500rpms+ my car is just so loud I can't explain it, but I love it that way Good luck with the long tubes man
Those long tubes are really gona wake it up even more and wait till you hear it scream when you put those on , Its also gona crackle and pop really loud. At 3500rpms+ my car is just so loud I can't explain it, but I love it that way Good luck with the long tubes man
Just what he Doctor ordered, thanks for the heads-up. Never been a fan of the quiet muscle car...
Im one that loves a loud exhaust, i have multiple friends that run UMP late model modified dirt cars im used to header only 600+ hp engines at redline. but for a daily driver i HAD to change my LM to the LMII or buddy popo would have a nice ticket filled out for sound ordinance violation. wait till you get your SLP headers you will be singin a different tune when you hear how loud it gets.. even with the change to LMII's with catless mids on kooks 1 3/4" I can still set car alarms off in parking garages and near downtown tall buildings. And the best part i can get my buddy with a 38' scarab twin 502's 500 hp each, tell me while on the phone that my car is FREAKIN loud!
Im one that loves a loud exhaust, i have multiple friends that run UMP late model modified dirt cars im used to header only 600+ hp engines at redline. but for a daily driver i HAD to change my LM to the LMII or buddy popo would have a nice ticket filled out for sound ordinance violation. wait till you get your SLP headers you will be singin a different tune when you hear how loud it gets.. even with the change to LMII's with catless mids on kooks 1 3/4" I can still set car alarms off in parking garages and near downtown tall buildings. And the best part i can get my buddy with a 38' scarab twin 502's 500 hp each, tell me while on the phone that my car is FREAKIN loud!
Hmm, I may need to re-think the SLP headers based on your post. Anyone have a sound clip of SLP headers and LMI or II?
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, Its also gona crackle and pop really loud. At 3500rpms+ my car is just so loud I can't explain it, but I love it that way 
Good luck with the long tubes man
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