Im thinking about going with the Flowmaster American Thunder 3 in. catback, but im also looking at Hooker, Mac, and Random Tech.

Would cat-back 3 in. be better or dual 2.25 in.? I really want to have Flowmaster 40 series on my car, but I SERIOUSLY doubt dual 3 in. LOL

What would you do?

Heres an idea I have, but i dont know alot about exhaust so i dont know if it would work:

headers-y-pipe-cat-y collector-two pipes going to two mufflers-tips

Get it?

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

That would work. Run the dual 2.25'' pipes side by side in the stock exhaust location. Follow the stock exhaust routing all the way to the back and somewhere along the lines put mufflers in there... but they must be small. I don't know if flowmster 40 series would fit (BTW, flowmaster 40 series do not have to be ordered with 3'' in/out).

Anyway, I do not know if those will fit very well though (ground clearance) but I am sure two chambered mufflers would fit becuase they are no bigger than the exhaust pipe itself.

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech Thermomaster chip with 160stat, MSD 6A, March Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell Universal 24# injectors

More info and pics on my webpage:http://go.to/iroc-z

AOL IMer: GPA 0point0

 

Dual 2.25" offers no performance gain over a single 3". Dual 2.5" could however.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

 

depends the setup, if just have a weeny 305 the y pipe to 3" single is more then enough.

 

flowmaster has a 3 in american thunder kit with dual 3in tips rather then 2.5 if thats what you are looking for.

on a side note the flowmaster gets really loud on those 70+ mph freeways in NC. just got back from fayettville and my ears are still ringing from the drive down and back.

i am looking for something quiter above 2500 rpm for freeway trips. i like flowmaster but if hooker is quiter on the freeway at say 80 mph i might buy it.

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89 IROC-Z L98

 

For your setup, and the price of converting to duals. I would just go with the Hooker cat-back.

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"Putting any amount of money into a RICE BURNER is like wiping your a$$ with a turd. "
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
3" Hooker CatBack w/Aero Chamber muffler
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat, just switched to 180* b/c of winter coming and going to college in the mts.
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

How does the Hooker sound at idle and say 2500rpm on the freeway? I love Flowmasters because of their sound. My dad has Flowmasters on everything he has, but his cars have a built 350, built 383, and a stock 403 BB, so I can't compare his to a 305.

Anybody with a 305...Tell me what you have and how it sounds. I want something loud, but not like drag racing open heads loud either.


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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter

 

At idle it's a nice low rumble, but when you get on it a definate head turner, or even when I cruise thru the college area in 2nd. There is a soundclip of it on this board somewhere.

 

I definately believe you, Mark...The problem is: You have a 350, I have a 305. Im sure the Hooker would still be a good choice too. I just have some kind of "thing" for Flowmasters. How much is the Hooker? I might end up buying that so my car will sound different. I plan on adding a 3 in. cat, K&N open element, Edelbrock Performer intake, and maybe a new, bigger cam(CompCam 264H). Other than those, I am gonna save up because I would like to have a 67-69 Camaro, or a Chevelle, Malibu, Nova, etc. in the long run.

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1987 Camaro Sport Coupe 305 V8 LG4-rebuilt-All Stock.

Future Mods: Flowmaster American Thunder 3 in. Cat-back, Catco High Flow Catalytic Converter, Hooker Super Comp Shorty Headers Jet Hot coated, K&N Air Cleaner, CompCam 264H, White Paint, IROC wheels, Alpine CDM-7871 CD player, Polk Audio speakers, Grant GT Rally Steering wheel,New Fuel Pump, Ground Effects, B&M Megashifter