I was curious, which would be better for mileage and horsepower? Straight pipes or glasspacks? I read where a flowmaster gets better mileage. Would straight pipes do it too?

 

Hmmmm...I'd be cautious about running straight pipes. You might wind up being driven crazy by the noise (not to mention attracting the attention of cops). I was told by the muffler shop that did my install that you lose very little with a true dual system and a quality set of mufflers. This is a first rate shop and these guys know what they are talking about. Consider an install like that and then add headers if you are looking for more power. Just my 2 cents. Good luck!

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1999 F-150 4x4 SuperCab, Deep Wedgewood Blue, ORP, 4-Wheel ABS, Loaded, Flowmaster 50 series, K&N, Tint, Super-White headlights, Westin Nerf Bars, Toff Spray-On Bedliner, Pioneer DEH-P3000 and TS-A6815 speakers, ADS PQ/8 amp.

 

Indigo: Check my stats: I did mine because everyone else I know has theres on Chevy's, so being me, I thought that it would be cool to be different and try it on a ford. I just didnt know/believe that it added 20 x-tra horsepower. My biggest worry was backpressure, but one of my best friends is a performance engine builder and he said that he thought it would be a very long time till I would suck a valve. Hope so! Thanks for the reply

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Thanks!

1993 F-150 302/e4od/355 Limited slip. dual exhuast w/o mufflers,2 1/4" pipes with Echo Tips, headers, accel plugs/wires(8.6mm)/rotor/cap, hypertech powermodule,5% dark tint. Alpine cd player and Pioneer speakers. I need to get it Dyno Tested and qtr mile times. And someday Ill get picks!!!!!!!!!

1989 F-150 XLT 4x4 302/aod true duals with turbo mufflers, 30X9.50" wild country tires, 3:55 gears w/LS(want after market LS for front) 3" SuperLift would be nice too!

 

Hey Pastmaster, I have seen a 4.6l w/ no mufflers, only cats. A guy at work owns the truck I talked to him and he was saying the truck has run fine no real benifit in performance, but sounds great. There were also no problems with idle etc. with truck running this setup.

Later, Akula

 

i think i'm going to get rid of the glasspack and have 2 Flowmasters installed.