valved exhaust system

[ms372]

will adding a valve to an exhaust that wasnt designed to have them change anything in terms of sound levels ?

for example the valved gintani exhaust looks like their regular muffler with the addition of two QTP valves and it seems to change the sound.

with


without



now if i was to add two QTP valves to my exhaust would this do anything or will it be a waste of money and im better off just change my muffler to something that is designed with it.

would appreciate some feed back

[benzy89]

Are you adding valves to a stock or an aftermarket (thus more aggressive) muffler? Adding valves to a stock muffler is a waste since it's the quietest muffler really can get.

The Gintani (or any other valved system) offers the best of both worlds. When you need to be socially acceptable, you can close the valves & get stock-like exhaust noise levels. AND then when you want everyone in a 5 mile radius to know you're ripping on your M3, you can open & the valves and let the S65 sing.

The difference between building your own & buying a pre-valved system (Gintani, Evolve, iPE, etc), is that the systems are designed to sound good whether the valves are open OR closed & with minimum drone.

By fabricating your own exhaust, you run the possibility of making the exhaust sound like crap or unintentionally creating drone.

[ms372]

Originally Posted by benzy89

Are you adding valves to a stock or an aftermarket (thus more aggressive) muffler? Adding valves to a stock muffler is a waste since it's the quietest muffler really can get.

The Gintani (or any other valved system) offers the best of both worlds. When you need to be socially acceptable, you can close the valves & get stock-like exhaust noise levels. AND then when you want everyone in a 5 mile radius to know you're ripping on your M3, you can open & the valves and let the S65 sing.

The difference between building your own & buying a pre-valved system (Gintani, Evolve, iPE, etc), is that the systems are designed to sound good whether the valves are open OR closed & with minimum drone.

By fabricating your own exhaust, you run the possibility of making the exhaust sound like crap or unintentionally creating drone.

thank you for the reply. i have a challenge sport x-pipe with a mesiesterchaft gt2 which is extremely loud. while it doesnt bother me at all some cop near my house stopped me and asked me to change it and if i did he will keep an eye for me and will be giving me a ticket the next time around.

i hate to change my muffler so i want to compromise and take it to a good muffler shop and costume make a valve system and if anything ill add a set of resonators to reduce any drone or rasp

[S65NAPWR]

Originally Posted by ms372

thank you for the reply. i have a challenge sport x-pipe with a mesiesterchaft gt2 which is extremely loud. while it doesnt bother me at all some cop near my house stopped me and asked me to change it and if i did he will keep an eye for me and will be giving me a ticket the next time around.

i hate to change my muffler so i want to compromise and take it to a good muffler shop and costume make a valve system and if anything ill add a set of resonators to reduce any drone or rasp

Sorry to hear that, I can't believe cops can make you do that. Just sucks.

[ms372]

Originally Posted by S65NAPWR

Sorry to hear that, I can't believe cops can make you do that. Just sucks.

had this setup for awhile this is the first time it happens, usually they just check my plate and leave me alone, but this time he was serious about it its all coz i downshifted without noticing he was in the other lane