Exhaust Setup
Thread Starter
11 Second Club
Joined: Nov 2017
Posts: 178
Likes: 26
From: Kentucky
Exhaust Setup I'm in the process of swapping a 408 into my 98 TA and I currently have TSP true duals and with the LS1 they sound really good, but they are loud and I wanna be respectful to my neighbors. I'm thinking the 408 is gonna make it too loud. Am I right in that assumption? Anyone have input on going from a cammed LS1 to a stroker on overall loudness?
408 Specs for reference
Callies Compstar Crank and Rods
Wiseco -15cc Pistons
PRC 247cc Heads
Cometic 0.040 Gaskets
Custom 235/243 .621/.624 112+4 on LSL Lobes
Fast Intake with PTM Throttle Body
408 Specs for reference
Callies Compstar Crank and Rods
Wiseco -15cc Pistons
PRC 247cc Heads
Cometic 0.040 Gaskets
Custom 235/243 .621/.624 112+4 on LSL Lobes
Fast Intake with PTM Throttle Body
TECH Junkie
Joined: Nov 2013
Posts: 3,913
Likes: 366
From: White Bear, Mn
Loudness is the reason I don't run full exhaust all the way back myself....
I run a un-catted 3 in. Y pipe into a 4in. merger with a 4 in. electric cutout. Then after that I run a stock catback to jam it up real good to make it manageable until I get out of the neighborhood with the cutout closed.
I run a un-catted 3 in. Y pipe into a 4in. merger with a 4 in. electric cutout. Then after that I run a stock catback to jam it up real good to make it manageable until I get out of the neighborhood with the cutout closed.
TECH Addict
Joined: Dec 2017
Posts: 2,180
Likes: 969
Probably won't be all that much different in loudness.
I have no idea what muffler TSP uses, but you might be able to measure it, and buy one that fits the same but is quieter. Walker/Dynomax are usually the mildest sounding ones.
I have no idea what muffler TSP uses, but you might be able to measure it, and buy one that fits the same but is quieter. Walker/Dynomax are usually the mildest sounding ones.
TECH Fanatic
Joined: Nov 2011
Posts: 1,367
Likes: 144
From: Woodstock, GA
I'm in the process of swapping a 408 into my 98 TA and I currently have TSP true duals and with the LS1 they sound really good, but they are loud and I wanna be respectful to my neighbors. I'm thinking the 408 is gonna make it too loud. Am I right in that assumption? Anyone have input on going from a cammed LS1 to a stroker on overall loudness?
408 Specs for reference
Callies Compstar Crank and Rods
Wiseco -15cc Pistons
PRC 247cc Heads
Cometic 0.040 Gaskets
Custom 235/243 .621/.624 112+4 on LSL Lobes
Fast Intake with PTM Throttle Body
408 Specs for reference
Callies Compstar Crank and Rods
Wiseco -15cc Pistons
PRC 247cc Heads
Cometic 0.040 Gaskets
Custom 235/243 .621/.624 112+4 on LSL Lobes
Fast Intake with PTM Throttle Body
Thread Starter
11 Second Club
Joined: Nov 2017
Posts: 178
Likes: 26
From: Kentucky
Yeah, it's always been loud. If it doesn't get much louder than it is now. I'll just keep the exhaust since I do love the way it sounds. It doesn't need to be quiet by any means at all. It just can't be significantly louder than it currently is.
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Going to be as much a function of compression as anything. You can always add cats, bullets, change muffs, or some combination until you get what you want. When modding: no way to know for sure until you experiment a bit or get lucky.
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