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Discussion Starter · #1 ·
Currently I have High flow cats on my car with all the other stuff listed in my sig. I just purchased some gutted cats for my dynatech headers and I wanted to know if I need to get my car re-tuned after installing them. I had my car tuned a little over a month ago and don't want to have to bother with tuning it again but I will if it's absolutely necessary....what do you guys think?
 

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why not just go catless (?) i did the gutted cat thing and saw maybe 2+rwhp over highflow cats, plus the sound was "tinnie"... however when i went straight pipe (no cats) after tune i picked up closer to 8 rwhp over the gutted cat...able to add more timing...
 

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Vette1171 said:
Currently I have High flow cats on my car with all the other stuff listed in my sig. I just purchased some gutted cats for my dynatech headers and I wanted to know if I need to get my car re-tuned after installing them. I had my car tuned a little over a month ago and don't want to have to bother with tuning it again but I will if it's absolutely necessary....what do you guys think?
IMO it's not necessary :cheers:

.
 

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Discussion Starter · #4 ·
C5 CU said:
why not just go catless (?) i did the gutted cat thing and saw maybe 2+rwhp over highflow cats, plus the sound was "tinnie"... however when i went straight pipe (no cats) after tune i picked up closer to 8 rwhp over the gutted cat...able to add more timing...

They are straight pipe...that was what I was trying to explain. The thing with the dynatech headers is the cat attaches directly to the headers. I had to purchase some pipes that would be compatable with the unique merger between the headers and the cats. Thanks for the reply :z:
 
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