Cat Front Exhaust:
Thread Starter
Senior Member
Joined: Dec 1999
Posts: 954
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From: Annandale, VA
Car: 1991 Formula Firebird
Engine: 2001 LS1 Modded
Transmission: 2001 4L60E Yank SS3600 TC
Cat Front Exhaust:
I am hitting 85k in my 91 Formula. I am thinking the cat is clogged and I am also hearing an exhaust tick and ratteling coming from the cat area.
I am debating my options for replacing the cat. Should I go dual cats? I would like to keep the factory set up so I can keep the air pump happy.
How much $$ and how much HP gain can I expect?
All opinions are appreciated.
Regards,
BILL
I am debating my options for replacing the cat. Should I go dual cats? I would like to keep the factory set up so I can keep the air pump happy.
How much $$ and how much HP gain can I expect?
All opinions are appreciated.
Regards,
BILL
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