I have a Gibson Dual outlet Cat back exhaust, and I have noticed the loss in low end torque, but have also noticed a slight increae in fuel economy and high end power. I was wondering, would you gain back the low end torque by adding an FIPK. Does anyone know the actual cfm increase? Would the increase flow offset the added volume of the dual outlets?

Any thoughts?

------------------
99 4x4, S/C, 5.4, 3.73LS, BLACK, 6 DISC CHANGER, GIBSON DUAL CAT-BACK EXHAUST

 

Shad,

A FIPK will give you more of the same gains that your catback exhaust gave you. More top end power and maybe a slight loss of low end torque.

Off topic: Did you ever live in New Mexico? I had a friend from there by the name of Shad.

Todd

------------------
93 F-150 4x2, 4.9L, E-4OD, 3.08 rearend, 31x10.5 BFG A/T's, Skyjacker Softride Hydro Shocks,K&N Airfilter, Jacobs Electronics Plug Wires/Rotor/Cap. (Other mods: Undecided!)

 

Todd,

Just Curious, I am in the process of ordering a pair of Jacobs Spark Plug Wires for my truck, how have yours held up and do they perform well for you?

Thanks

Randy

------------------
'98 XLT SC, 4.2V6, 4spd Auto, SuperChip, BugflectorII, 50th Aniversery Flooor Mats, K&N Filter, Hard Tonneau Cover, Billet Grill and Insert, Sony CDX-6850 Head Unit, Soundstream Rubicon 405 Amp, JBL GTO 5x7's All 4 Doors, Qlogic 8" sub-enclosure with Kicker Punch XLC Woofer,SuperBrite Bulb Replacements...and More Mods to Come ( If the wife will just agree to them )

http://206.170.51.68/truck

 

forgeur,

I've used them on two of my vehicles and think they are great. They are warrantied for life so if they ever go bad, Jacobs replaces them for free. No questions asked. They cost $62 for my 4.9L, so I'm sure they would be priced in the neighbor hood for your 4.2.

Don't worry, you made a great purchase. Enjoy!

Todd

------------------
93 F-150 4x2, 4.9L, E-4OD, 3.08 rearend, 31x10.5 BFG A/T's, Skyjacker Softride Hydro Shocks,K&N Airfilter, Jacobs Electronics Plug Wires/Rotor/Cap. (Other mods: Undecided!)