Ggreen
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- Last seen
- Joined
- Jul 27, 2017
- Thunderbird Year
- 2004
Has anybody changed the cat converter To a larger flow one. If so do you realize an increase in hp?, and how much. Trying to squeeze every inch of HP out of her!
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- Last seen
- Joined
- Nov 7, 2016
- Thunderbird Year
- 2005
I just installed the Borla Cat Back system, big difference! Auto Anything has the best price
Ggreen
Click here to upgrade
- Last seen
- Joined
- Jul 27, 2017
- Thunderbird Year
- 2004
I already have the Borla exhaust, wondering about the cat converters themselves.