I have been looking at getting the X-pipe and outlaw series mufflers for my Boss. I know this will do away with the stock H-pipe and mufflers which are fairly restrictive and was wondering if anyone else has swapped out the stock H-Pipe and mufflers and seen any gains.

 

i got nothing of an axle back, did before and after on the dyno

 

you will gain 15-20rwhp with an offroad x pipe...no real gains to be had with the axle back. Do a good dyno tune, o/r x pipe, and JLT intake and you will have 30-35 rwhp and over 40lb/ft tq with huge gains under 3500 rpm

 

Can similar gains be made with hf cats instead of an o/r set up. I would need to pass emissions and was looking at selling my stock h-pipe if possible so I couldn't just swap back for emissions.

 

Or do they have tunes that can fool the ecu into thinking there are cats so when I go get tested it will just pass?

 

hf cats will gain 5-8 hp...and yes tuners can turn off the rear o2 sensors. No way you will pass any sniff test though LOL

 

depends on the sniff test........ these cars run alot cleaner...... i have passed sniffer tests in PA without a cat...... they dont go into the cars computer just a tailpipe tester

 

MD checks under the car too (at least in my town they do)
they will not pass you and still take your money, then you will have to pay to fix it and then pay your $14 again for them to say it passed! RIP OFF!!! MD

 

I will have to just get some HF cats. SINBUSTER007 are you going to the American Muscle meet in PA on the 12th?

 

i will not be making the trip on the 12th.
since im in western MD, its just a little too far for me to travel at this point.
maybe next year.

 

I bolted on a magnaflow comp cat back (retains stock h-pipe) my butt dyno said it didnt gain power. Sounds mean as hell though lol

 

My car gained 12 HP with the Magnaflow Boss X Pipe and catback.

 

Good dyno results! Thanks for sharing!

 

Was that with or without a tune. I hope to gain the same or slightly more since I am going with a GT x-pipe to save some weight.

 

Nice Magnaflow setup. How about a part number for the Boss specific X-pipe. I don't see it on the Magnaflow site. Should post a sound clip sometime.

 

They list 2 X-pipes and cat back exhausts on their website. Part #15056: http://www.magnaflow.com/02product/s...ne=all&id=4304

And a second one, #15166: http://www.magnaflow.com/02product/s...ne=all&id=4306

They do not appear to sell just an x-pipe by itself.

Here is a sound clip from Magnaflows website: http://www.magnaflow.com/04sound/dom...302_15166.html

 

Oh ok thanks. I saw those but I guess I didn't know what the **** I was looking at for sure. I see the sound clip is with comp series mufflers. I think I'm leaning toward the Flowmaster American Thunder (817553 kit)sound the more I listen to it. They both sound great tho and it's really a hard decision.

 

I will put a sound clip up of my exhaust and see if you like it, I went with the outlaw series mufflers and x pipe from flowmaster.

 

No tune.

 

Awesome, I hope I gained as much.