BlackSVT03

iTrader: (1)

I know these are highly frowned upon, but my friend has a flowmaster on his longtubes and O/R Y pipe and I really like the sound. It has a chambered sound to it.

I have an 80 series with longtubes and an O/R Y and it just sounds deep. Is there another flowmaster that fits the cross flow patern on LS1s Camaros and Trans Ams? Just curious. Like I dont think the 40 series comes in a cross flow. Does it?

Thanks guys,

bww3588

iTrader: (49)

no there isisnt, the 80 series is the only crossflow design. and it flows worse than the stock cat-back. your only other option is a traditional flowmaster in the i-pipe or custom duals with 2.

5_02ls1

iTrader: (20)

the catbacks only come with the 80 you need to purchase the 40 seperatly.i have the 40m series on my car.it sounds great.summit or jefs either one has it

LS69TA

iTrader: (30)

Not all Flowmasters are bad. It's just that the 80 series they make for our cars sucks.

HottLS1Z

iTrader: (5)

My 98 has true duals dumoed on it using 40 series on full bolt ons sounds great

ChocoTaco369

yes, it flows bad. i don't know if it flows worse than STOCK. flowmaster still claims an increase in power over stock. i doubt they're lying as that would be false advertisement. you probably gain 2-3 horsepower over stock. most catbacks net you 10 on a stock car, and with heads and cam, a flowmaster can be a 20-25 rwhp bottleneck. however, at that level, the stock is probably more like 30 rwhp.

of course, this is all speculation so don't take this as gospel. however, "flows worse than stock"...i don't personally believe that.

RevGTO

iTrader: (12)

I believed what everybody said about Flowmasters being so restrictive until I watched my buddy with a Flowmaster 80 do back to back runs cut out open and closed. No difference (actually .03 better closed!). This was lid/LT's/ORY ... maybe at big power levels it would be restrictive, but not stock or mild bolt-on.

GT Griller

iTrader: (8)

true-duals with single chambers are the way to go....get to keep that flowmaster sound with great gains!!!! but im biased...lol

kbronSS

im planning on installing a little Ypipe right over the axle, which would make two pipes.....then install a single chamber on each pipe.

ChocoTaco369

i'm not calling you a liar or anything, but i've heard of people gaining 20 rwhp by opening their cutout with a flowmaster. this seems to be a common figure for a full exhaust + cam only car. it sounds to me like your friend may need a tune? i've heard of people going with longtube headers+ory and only gaining some 5 or 6 rwhp. it's a very rare event, but your friend may be one of them and that's why flowmaster's restriction isn't showing up. no matter what muffler you run, you should gain a bit with the cutout open. i hear even loudmouths gain with an open cutout.

RevGTO

iTrader: (12)

I'm not drawing any huge conclusions ... I was there, watched the runs, examined the timeslips and we were both surprised. It's just that when everyone says what HUGE restriction a Flowmaster 80 is, here's some evidence to the contrary. Take it FWIW and compare to your own experience.

taintedmeat

iTrader: (1)

Pics and clips?

redz_02

iTrader: (4)

I run an 80 on mine, love the sound, as for the flow issue, thats what they make cutouts for.

02BEAST

iTrader: (8)

Just put a cut-out in there and your good I did it sounds great.

5_02ls1

iTrader: (20)

id love to hear that setup as well

NHRAMAN

iTrader: (1)

NO IT DOESN'T. I have seen many charts on here....so have many others....I have lt's+ory+cutout+80 series.... Sounds good...C/O open 1/3 of the way.

INMY01TA

iTrader: (1)

Personally I think Flowmaster sounds much better on an LT1 or Stangs than LS1 cars. I had the 80 on my TA with and with out headers/ory and thought it sounded pretty weak.

bww3588

iTrader: (49)

ok, for the NIT PICKERS on here!, it is regarded as the worst flowing aftermarket cat-back on the market.

bww3588

iTrader: (49)

an LS1 IMO doesnt have a good exhaust note with any exhaust, unless its cammed.