40 Series Flowmaster
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Joined: May 2004
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From: Louisville, KY
40 Series Flowmaster HOW DO THE 40 SERIES FLOWMASTERS FLOW ON LS1s? I WOULD LIKE TO RUN A SINGLE OUTLET SET UP ON MY CAR. ANY INFORMATION REGARDING THIS WOULD BE GREATLY APPRECIATED. 
Originally Posted by #3z-28
HOW DO THE 40 SERIES FLOWMASTERS FLOW ON LS1s? I WOULD LIKE TO RUN A SINGLE OUTLET SET UP ON MY CAR. ANY INFORMATION REGARDING THIS WOULD BE GREATLY APPRECIATED.
actually the 80 series was made for the late model F Body in mind. Not sure if you are able to run a single outlet with this muffler though. as far as I know they are one inlet, dual outlet... someone correct me if i am wrong
Originally Posted by #3z-28
HOW DO THE 40 SERIES FLOWMASTERS FLOW ON LS1s? I WOULD LIKE TO RUN A SINGLE OUTLET SET UP ON MY CAR. ANY INFORMATION REGARDING THIS WOULD BE GREATLY APPRECIATED.
Actually I had the 40 Delta flow series on my 77 Camaro. I replaced them with Edelbrock RPM mufflers. I did have the 80 series on my 98 Z-28 when I bought it, but I swaped it out for a Hooker Aero chamber.
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From: Michigan
I have the Flowmaster 80 and they are single in and dual out. However, I have been told to get something else since these do not add any more HP than stock. They came with the car when I bought it.
But who knows???
But who knows???
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Joined: Jun 2003
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From: So Cal
Originally Posted by zombie1
Flowmaster sucks!It doesn't flow very well at all. 
Originally Posted by Revelation222
I lose 17 HP and 9 TQ when my exuast is run through my flowmaster instead of my cutout. The only flowmasters that flow worth a **** are the single chamber race mufflers. They are single in/out however and are pretty loud.
how can you compare an open cutout with a chambered catback?? 
you can run a 40 series and just have a single tailpipe. my setup is like that (except with a dynomax bullet) and i have a single 3" tail that turnsdown at the bumber like on the mufflex 4" systems. it hides well and i'm sure it flows better than a crossflow 2 outlet muffler.
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From: So Cal
Originally Posted by hourang
how can you compare an open cutout with a chambered catback??Because if you compare a hooker cat back VS a cut out you only lose like
2 HP. Many other mufflers out there lose 2-5HP, but the Flowmaster,however, you can lose 15-17 HP. That is how you compare the effienciency between cat backs.
Thank You.
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From: Bloomfield, NM
i had the 80 series on my 99 t/a for a while. it sounded great, very clean and wasnt too loud, but i replaced it with a loudmouth and i can feel the difference. the LM is extremely loud however, even in the cabin.
80 series are horrible, a 40 series would be better. I used a 40 series on my lt1 Z and with the headers it sounds great. The muffler sits where the cat used to be, right after the y pipe, then I just have a single pipe that leaves the muffler and splits after the axle.
Originally Posted by SnakeKiller
80 series are horrible, a 40 series would be better. I used a 40 series on my lt1 Z and with the headers it sounds great. The muffler sits where the cat used to be, right after the y pipe, then I just have a single pipe that leaves the muffler and splits after the axle.
