I am about to order a down pipe, but before I do I wanted to know is there really a HP difference between having a Cat and not? And if so how much of a difference would it be?

 

IMO catless vs. high flow cat are the same. more raspy with catless

 

Nothing without tune

 

Well once I put my new injectors in and tvs I will be getting a tune, so with a tune how much HP will the difference be between cat and no cat

 

I think it's like 10hp?

I think on the lsj catless makes it really raspy

 

if u dont care about the noize catless ig uess.

 

Just took my cat out not to long ago, i have a full vibrant exhaust and it got alittle raspy. Kinda annoying but everything flows better without it so ill just deal with it for the extra power. I heard ppl say about 10-15 hp gain

 

if ur going tvs you might as well go catless cause chances are you'll end up going meth or e85 which could possibly cause cat problems down the road.

 

alright sounds good I was also worried about passing inspection, and by the way your car is beautiful haha

 

You won't pass inspections I'm pretty sure