richard4221

do i need mufflers in my exhaust or can i stick with bbk shorty's and magnaflow bullets....they are just pipes, no converters or mufflers....will long tubes higher my performance or we dont really need it...

ooticamitica

if you dont have mufflers it will sound like ***. and long tubes are more for built engines so just use shorties.

DIMMER

The Myths:

Longtubes will lose low-end power/torque on a stock mustang.
Mike Hudson - I went with the ever too big 1-5/8" LT's on an otherwise factory original 5.0 and gained hp and tq all across the board. A min. gain of 5hp/tq was seen at 2000(where the pull started) and paeks of 15.2hp and 14.7tq were recorded. Peaks were up a mere 100rpm for hp and 200 rpm for TQ. Dynos are neat and all, so, at the track, with the extra hp and rpm I gained a soild 3/10ths and 2mph.

I took that from anouther mustang tech site.

I just found that interesting. since my lil 3rother has 3 f-bodys and hes building one up and they same the same for LT1's lol

uni_uni

Keep mufflers, depending on where you are you could get an H-pipe without cats but definatly keep the mufflers.


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nitrous_bob

yes you need mufflers, it will run slower from no backpressure.

reduced backpressure is good, none is bad

i disagree on the longtubes, i'm using them for the second car. i say do it. plus they sound way better.

my '89 went went 13.20's w/ just longtubes, 4.10's, ac and smog delete

richard4221

o.k. i have the bbk shorty headers only and i think its hooked up to the stock h-pipe and then the magnaflow bullets....why did you get the all american thunder cat-backs for???performance???thats what im trying to get at...dont you need restriction so that you can burn your exhaust instead of running lean because of my set up...

86 GT 5.0

Running lean doesnt have to do with your exhaust it means you not getting enough fuel... If i were you I would just throw an off road h or x pipe on and call it a day since you already have headers and a catback...

richard4221

no i dont have a catback just bbk shorty headers, stock h-pipe, and magnaflow bullets....will i be o.k. with that....or can i gain hp by putting mufflers and then longtubes...

richard4221

bump

5pointslow91

headers, xpipe and mufflers, your making it complicated, with long tubes you run the risk of denting them up on a daily driver with bump and ramps