Just wondering if anyone know the gains that can be anticipated from installing these components? I plan on doing this weekend as well as a tune. My first dyno run, with my mods what do you guys think I am making?

 

which exhaust! gt500 or ????????????
they have 3 different ones

 

jgt500

 

Just a note:

Espelir JGT500 does taper to stock diameter where it meets the cat. and has a about 2.5in resonator. So it's not 100% 3in but more like 90-95% 3in exhaust and wouldn't make optimal power like some full 3in exhaust (maybe like 3whp less).
But, on the good note, it's street legal, great quality and not too loud.

 

i had the JGT500 exhaust/helix DP and cat delete, and made 363hp/340tq on a mustang dyno a few months back. i was damn pleased with the settup. if i wasnt selling the car, id be keeping it the way it was.

 

thanks isnt there a wierd bias on mustang dynos

 

with my set up i could not use the mechanical o2 fix. it pushed the o2 sensor into the bottom of the car.

 

Yep...I have the jgt500 as well...and love it! Have it on for over a yr now..no problems, and quality is top notch... its just not the "popular" name brand...but JDM

I made 390whp on mine...sounds superb too! Go for it! (btw, i used to have the helix dp along with this exhaust, and great there too! But since I have the ATP turbo kit, it came with the dp...so i switched out)