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Originally Posted by BLACKISWHACK
In the past I called Blacktrax and the person who answered the phone said that on application to a lude, the ECS system was 5whp after the cat and 10whp before the cat. But I did not know who was on the phone, but it was a girl.
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PM dvsracergirl, she is a member here, she'll tell you all you need to know about the ECS. I think she made a bit more with the ECS open on her car, but this was without a cat, and with her race motor

If memory serves me, they will not install it before the cat because that would require modifying your header.