Quote:
Originally Posted by shtou
removing the cat from 1.8 TS standard yaris and install a new exhaust helps the acceleration?
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The removal of a CAT will give you a very small gain...
This is what I did with very good results:
I removed only the secondary cat (our car has 2 cats) and left the primary cat alone, that way the car will pass emmissions test.
Then I removed all the exhaust from the primary cat back and replace it by a custom unit. I used 2.25" pipe, a resonator and a rear chambered muffler.
Sounds great and I felt some good gains on the top range mostly.