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Feb 15, 2008 | 05:46 PM

my bandit

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From: Jacksonville, Fl

Popping

i just installed my slp loudmouth system (without y pipe) and ever since then i have been noticing that it pops whenever it is revving down and i dont know if i need to worry about this or not

Feb 15, 2008 | 05:53 PM

Disturbed Bird

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From: Savannah, GA

well i know on the lt1 cars with the factory y has a flat spot in it that cause the popping. so i guess its the same with the ls1's.

i never had a ls1 with the factory y

Feb 15, 2008 | 06:03 PM

my bandit

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From: Jacksonville, Fl

the ls1's do also
see i dont know if its that but i might be getting a new one soon or if its that the car is cold bc it still does it when its up to temp but not as bad

Feb 15, 2008 | 06:29 PM

Dave 96TA

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From: S Florida

It's a combination of the lack of backpressure from not having a muffler and the flatter y-pipe on the driver side for clearance. My LT1 popped less after I got headers and a nice y-pipe.

Feb 15, 2008 | 07:19 PM

ErikElvis

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From: DE La Ware

Popping and gurgling when revving down is more or less normal.

Feb 17, 2008 | 07:15 PM

Carter01

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From: South Ga

Nothing to worry about except the sound. Sometimes the tips you are running can cause the popping sound to increase or decrease. With my old 95 TA i changed from the 2 split style tips on each side to a single opening tip on each side and it helped to reduce the popping.

Feb 17, 2008 | 07:33 PM

orangeapeel

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From: Justin, TX

It is the firing order unfortunately and the resonance of the AL block that magnifies that sound.

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Feb 17, 2008 | 07:50 PM

orangeapeel

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From: Justin, TX

having an open exhaust with a resonator style muffler, i.e: loudmouth, will also amplify the already existing effects.

Feb 17, 2008 | 08:53 PM

#10

Revelation Z28

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From: Rialto CA

its normal.

flowmasters amplify it though

Feb 18, 2008 | 06:25 PM

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silverLSWON

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From: pittsburgh, pa

my dad has stock manifolds and y, loudmouth with CME and it pops like crazy when cold. when it warms up its not as bad but it's damn annoying. when my buddy got headers and an ory, the noise went away on his car. i picked up an slp y pipe for my dads car so hopefully it helps