hey all ive got a 92 f150 with a 4.9 and aod tranny

i am currently getting about 12-14 mpg which is made up of probly about 70% city stop and go dricing and 30% highway(50-70mph cruising) and i am looking to pick up a couple more mpg's

from what i am told i can pick up a lil more if i swap in a bigger diametere cat back exaust...so i am wondering where i can get an affordable cat back system....i am also told that there is some place out there where i can get a "high flow" cat converter for a decent price

i looked at jc whitneys setup as seen here

http://www.jcwhitney.com/webapp/wcs...ZX&appId=420791


DEEP-TONE DUAL-OUTLET CAT-BACK exhaust SYSTEM KIT
Complete kit includes resonated tips for a rich, mellow tone
Straight-through design reduces back pressure allowing engine to "breathe" better for more power, top performance and improved fuel economy
Mandrel-bent 16-gauge steel tubing, aluminized for extra-long life and rust resistance
Extension pipe can be cut to fit any wheelbase. Easy bolt-on installation. No welding required. 50-state legal system is complete with 2 muffler tips (replace original muffler) and all exhaust parts from the catalytic converter back (including exhaust pipes, hangers, clamps, hardware) and instructions. Replacement muffler tips sold separately.
(A) Kit is a muffler-back exhaust system, similar to cat-back system except original connector pipe (between catalytic converter and muffler) is cut in front of muffler and attached to new "Y" pipe; complete with 2 resonated tips (angle-cut polished stainless steel or blunt-cut black powder-coated) and all exhaust parts.
(B) Angle-cut tips.
THIS IS THE SETUP THAT JC WHITNEY OFFERS

and i also saw one at summit racings as mentioned below

http://store.summitracing.com/defau...searchtype=ecat

THIS IS WHAT SUMMIT RACING OFFERS

Free-flowing exhaust system.

Exhaust System, Cat Back, aluminized, Ford Truck

Replace your stock exhaust with one of these free-flowing exhaust systems from Summit. They're designed to clear trailer hitches and spare tires unless otherwise noted. Our cat-back systems feature mandrel-bent aluminized tubing, single or dual outlets, a turbo muffler, and all hardware needed for the installation.


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Beginning Year 1980
Ending Year 1996
Make FORD
Model F-150 PICKUP
Liter 4.9L
CID 300
Exit Quantity Dual
Exit Location Split rear
System Material Steel
System Finish Aluminized
System Style Cat-back
Inlet Quantity Single
Intermediate Pipe Diameter 3 in.
Tail Pipe Diameter 3 in.
Tip Diameter 3 in.
Quantity Sold as a kit.



now if anyone knows where i can get a better price on a cat back setup for this truck dont hesitate to tell me where to look...

 

I put a Dynomax system on my '95 4.9L, and it sounded really nice. I had the long bed, regular cab, with 5 speed.

I ordered mine from www.jegs.com

Good Luck