My T/A failed for high no2, all other readings were in spec.It a 305 H.O.I was told that this means my converter might have to be replaced, its the original one that came with the car,is this the case or should I look at something else on the car?

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73SDT/A 77 T/A6.6 85H.OT/A

 

well how many miles does it have, i have heard that the stock cat is good for only 50k miles but i dont know if that is really true.

 

You could always just by a hi-flo cat anyways, you'll improve performance and sound, plus it might be just what you need to pass emissions.

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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 Megashifter, 5" Autometer Tach w/shift lite
Soon to be installed
3:73 Richmond Gears and 3" Hooker Aero Chamber
Corvette Servo & .500 boost valve
15.61@ 95.2mph G-Teched, 1-2 shift slippage
"There is nothing more addicting than speed"

 

I am looking for a high flow catalytic converter. Any suggestions as to which one to buy?

Thanks.

Paul
'89 IROC
305 TPI