i was thinking of getting a 40 series flowmaster muffler for my formula. My question is has anyone who has had or have this noticed alot of noise in there interior? I want to hear it...but i dont want to make myself deaf...Thanks. Any info will help.

 

I've experienced it....if you don't want noise in your interior.....don't go with the 40 series.....it's very loud. Like 3 times louder then the 80 series......

 

40 series delta flow supposedly has signifigantly less interior noise

 

if i went with the delta series....would it still be loud on the outside???...but not like monster truck loud??/?

 

"40 series delta flow supposedly has signifigantly less interior noise"

Yes, it's supposed to sound practucally the same outside but not inside. The regular 40 Series you hear everywhere.

 

Does anyone have the correct part number for 40 Series (Delta Flow) Flowmaster for a 1983 Pontiac Firebird (V-8)? I have the 80 series now, but I want a little more sound.

Thanks


Jeff

 

go to flowmastermufflers.com and they list all their products and part #s.

 

Dont waste your $$$ on the 40series the 80series is the EXACT samething except dual outlets. In fact Flowmaster will even admit the 80series is a little bit louder then the 40's. So save your cash and get something that matters, cam, intake, custom prom, etc. I went threw all of this already, I know from experience trust me....

 

Thanks Formula 305FI.. I'll do just that..In fact, I already have an 80 series from my wrecked (sob sob) 86 Bird.. I just wanted to try something different.

Thanks for you help..

Jeff

 

The 40 series is NOT the same as the 80 series at all.....there is much less restriction in the 40 series than the 80 series. The reason I got an 80 is because there is dual outlets.....but..I wissh I could have the tone of a 40. Maybe they make 2 different type of 40 series....i dunno...but..I know for a fact, that the 40 series and the 80 series have a completely different tone. The 40 like I said before is like 3 times louder than a 40. I'll see if I can get ahold of my buddy on here....he has the 40 series....and it has a completely different sound.