Anyone out there have definitive answers on stock exhaust vs. aftermarket cat-back systems? I'm a new member and am seriously considering purchasing a 2001 L; however, I have test driven a 2000 L and the stock exhaust note leaves a lot to be desired. I have looked at old posts and the general consenus is there is no significant power gains to be made in this area. I've read that power gains are negligible at best, and even read mag articles where HP has been lost. What's up? I have owned several normally aspirated and supercharged Mustang 5.0's and have always gotten at least 15 HP from cat-back exhaust alone. Is the stock exhaust that good?


99.5 Black Eddie Bauer Expedition
95 Black Cobra, many mods

 

I took off my muffler, and I love the sound. I also lost .2 in the 1/4 mile. But thats just me.

Welcome to the board.

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99 Black Lightning
factory tonneau cover, 100k mile warrantee, Line-Xed
F150online.com R hp sticker mod in the mail. Where's it at?
2.145 60' 8.789@82.71 (1/8) 13.603@101.05 1/4 same run
straight pipes, 'Major' rear lights, no chip
Lightning!
Kills! More kills!

 

You've pretty much answered your own question. Put Flows on mine strictly for the sound effects. Much prefered over the Escort muffler that comes on them.

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Red '00 Lightning,
Power Surge Performance enhanced,
Sound effects provided by Flowmaster,
375 RWHP,
445 RWTQ,
12.974@104.818
Track Videos

 

4D Thunder,

What part # Flowmaster muffler did you install? I have seen some companies that sell cat-back w/ Flowmasters installed in MM&FF (mufflex comes to mind) that integrate two mufflers. Not sure if they are the old 40 series 2-chamber or 3-chamber or the Delta Flows. Let me know if there is the ever present 2000 rpm drone or not with your setup. Thanks


99.5 Black Eddie Bauer Expedition
95 Black Cobra, many mods