Hey all,
I already have a Tanabe cat-back, and my SRT intake is on the way. How many more HP can I realistically gain from changing headers and downpipe too?

Appreciate any feedback.

 

Its not a huge difference to be honest. When I dyno with injen intake/ toyomoto headers/ypipe/ greedy catback. Tuned with SAFC II. I had 197rwph.

I mean I could tell a slight difference. Im getting a new set up with mazzuri headers 3inch catback with HKS cam gear II, im hoping I can make 215rwhp.

My buddy make 210rwhp with the mazzuri full set up and SRT intake.

GL let me know if you need to know anything.

 

btw my headers will be off the car soon. if your intrested. Ohh and the full mazzuri set up was $968bucks shipped to my house

again GL

 

How much you asking? And is it headers and y-pipe or just headers?

 

Also, by not much....what are we talking? 3-5hp?

 

Honestly I didnt do a before and after dyno, I had only had injen intake and greddy exhaust.

This would be toyomoto headers and ypipe gen 1.5, I would sell for $225 plus shipping. (They dont make these anymore)

Only 7-8k on these and right now I'm not driving the IS.

edit: the site claims 10-15hp. before after. Yes I do feel a decent difference.

Again I will be posting for sale in 1month on here and my.is

 

Its not that huge of a difference, but it is an improvement nonetheless