Mark A Shields

I am ordering a 3" cat back exhaust and I don't have a cat. So I am either going to have to get a section welded on to take the place of the cat or get a cat considering I haven't been able to pass emissions ( 5 times so far), does having a cat on the car really affect performance and sound that much , emissions isn't that big of a deal to me though, it's only $14 a month to have it tested and I'm sure eventually I can pass.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER, NO CAT
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
3:73 Richmond Gears and 3" Exhaust
"There is nothing more addicting than speed"

Marc 85Z28

iTrader: (3)

HAH! You'll never pass Maryland emissions without a cat!

Catco makes a very good, high flowing 3" inexpensive converter. It costs like $90 from Summit. My car "fast passed" Maryland's emissions test - most new cars dont do that.

BTW - I now have a straight pipe in place of the cat because of the speedbump from hell that busted up my converter. I felt no power difference and no sound difference either. When emissions comes around for me again, I will buy another Catco.

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1985 Z28, Jasper Class 1 350, Edelbrock Performer intake, Dual snorkel air cleaner, K&N, Edelbrock headers, Catco 3" cat, Hooker 3" cat-back, Richmond 3.73's, built 700r4 w/Darrell Young 2400 stall TC, JET Stage 2 chip, Hypertech coil, Lakewood LCA's, Powertrax locker, SSM subframes, Centerline Auto Drag's

iroc5speed

If you get a high flow cat you probably won't see any difference over the stright pipe. Although, if you get a stock converter, you should just gut it, it's much louder that way.But cats cut down on emissions a lot, I'd just get a high flow and leave it.