Catted H- pipe HP Gains?

[Pops Fun]

Hi,
My MAC catted H pipe came in Saturday probably putting it on Monday evening. I am thinking a 10 to 15 HP increase. Will dyno in a couple weeks.

What do you think??

Lowered (Eibach 52/94), Cold Air Kit, Under Drive Pullies, Ford 3.73 Gear, Steeda Tri-Ax, Flowmaster Exhaust, Mac Shorty Header, TFS TW Heads, Steeda 19 Cam, Cobra Intake, FMS 65mm T/B, Pro-M 75MM MAF, Steeda 24# injectors, H&S 1.72 Roller Rockers, MSD 6al, Blaster coil, Walbro 255 LPH, Timing chain and Gear

 

[final5-0]

You might gain that much considering the mods you have if you now have the stock 2 cat pipe.

I would think it would be closer to 10 than 15 but the dyno will confirm.

Later
Grady

 

[cobra8]

I would think you should get at least 10-15hp with the H-pipe. Why not no with the off road ? It is a Pain in the A$$ when it come time for emissions but they sould better/louder.

 

[Pops Fun]

Hi,
Didn't want to be changing it all the time..
The install was put off for about a week today, My grandson is sick and I use my son and his lift for the work.

Steve