what is the pros of cutting out the cat in my car


Asked by Apr 05, 2014 at 03:39 AM about the 2002 Audi A4 4 Dr 1.8T Turbo Sedan

Question type: Car Customization

what are the pro*s in cutting out the cat in my car

4 Answers

Tom Demyan

I can't think of any. A good catalytic convertor is better than none. Cleans the air, supplies the necessary back pressure to the engine, etc.


You may gain a couple more horsepower, but if you live in a state that makes you pass a smog test, you will fail. Then you will have to spend big bucks to by another. Unless you keep it and just weld in a straight pipe. Not sure but if you have an O2 sensor on the downstream side of the cat, that may cause your check engine light to come on which is a no pass for a smog test also.

James Kitlas

Not a good idea unless you are racing only. There are perf cats available too with larger dia inlet & outlets for bigger exhaust tubes. And I think this removal messes-up the O2 sensor. JIMZ


more cons then pros in my opinion.unless you want to put the stock exhaust each time you need to pass smog.

Your Answer

Add photo

Related Questions


Looking for a Used A4 in your area?

CarGurus has 12,974 nationwide A4 listings starting at $1,500.


Search Audi A4 Questions

Audi A4 Experts

#1 Deathjam4
Reputation 2,590
#2 FordNut
Reputation 750
#3 lukeyramone
Reputation 450
View All

Related Models For Sale

Used BMW 3 Series"
1,597 Great Deals out of 39,619 listings starting at $888
Used Audi A6"
160 Great Deals out of 6,819 listings starting at $2,195
Used Audi S4"
48 Great Deals out of 911 listings starting at $3,900
Used Mercedes-Benz C-Class"
882 Great Deals out of 32,205 listings starting at $1,200
Used Audi A3"
74 Great Deals out of 4,218 listings starting at $3,500
Used BMW 5 Series"
635 Great Deals out of 18,796 listings starting at $1,500
Used Honda Accord"
1,254 Great Deals out of 78,695 listings starting at $1,400
Used Ford Mustang"
725 Great Deals out of 41,064 listings starting at $900
Used Audi A8"
30 Great Deals out of 1,824 listings starting at $2,995
Used Mercedes-Benz E-Class"
758 Great Deals out of 22,807 listings starting at $1,850
Used Chevrolet Camaro"
799 Great Deals out of 38,820 listings starting at $2,650

Used Cars For Sale

2017 Audi A4 For Sale
5 Great Deals out of 6,253 listings starting at $31,200
2016 Audi A4 For Sale
12 Great Deals out of 304 listings starting at $24,999
2015 Audi A4 For Sale
16 Great Deals out of 391 listings starting at $21,890
2014 Audi A4 For Sale
42 Great Deals out of 789 listings starting at $17,463
2013 Audi A4 For Sale
64 Great Deals out of 940 listings starting at $12,950