I need some advice an a new cat back system..... I either want to get the Dynomax Ultra Flo cat back system or the Hooker Cat backs…. I´m not sure which would give me better flow ??….I´m not too much worried about the sound…..whatever I want to stick with a 2´5 system

I also want headers but I´m not sure with which one to go …. Any ideas ???

What HP gain could I expect from that exaust work ?

Thanks,

-Alex

 

anyone ?

 

I would definately go with the Hooker cat-back, I just got this and wouldn't go any other way. I had just had 3:73's installed right before putting on the cat-back and I could easily notice the power gain. But this was a 3" system.

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'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
3:73 Posi
Rebuilt 700R4
B&M Megashifter, 5" Autometer Tach w/shift lite

 

get the hooker, as I found out after the fact, dynomax puts a flat spot in their 3" pipe over the axle.

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-Tas
'89 Formula WS-6

305, TBI, auto, 14x3 chrome flat based open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips....

To be installed eventually far far far into the future: Yours if the price is right and I don't have to ship :
Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248), Catco 3" cat, and injector spacer.

Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz

 

If I had to pick from those two..I would have to say the hooker

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1988 Sport Coupe 305 TBI
K&N
Flowmaster 80


Daily driver:
1988 K1500 5.7 4x4 shortbed flowmaster cat-back gutted cat.
AOL: RyanNH84

 

I would definately go with the Hooker system

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-Don't buy any wooden nickels

 

I have a dynomax 3" cat-back on my 1987 TPI 305, I wanna stick on a hooker aerochamber to replace the ultra flow, I din't put this on the previous owner did.

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1987 Black 305 TPI 5spd IROC, seems to be fully loaded, but can't find RPO codes.

AIM: SzkiRM125
F-bodies : The last with-standing defense against the Invasion.