AndyscionTC

I wonder will the TRD exhaust help the TC gain horsePower? does anybody know

PrivateTucker

I suppose it does since it may allow a more free-flowing exhaust. Not much though, since there is still restriction in the rest of the exhaust.

miraclecreator

i just installed the TRD exhaust couple days ago. Certainly sounds better but as for the HP gain, i'm sure there is a gain but not sure how much, and is it just me or does anyone feels like the whistle sounds louder and feels like the air flows smoother?

ack154

iTrader: (7)

Maybe like .5 hp or 1 hp at absolute best. Nothing noticable. It's an axle back system, so the real exhaust restriction is from the header back (mainly the s-pipe off of the header). So the restriction still exists. You might notice some gain with a cat-back system... but axle-back is really just for the sound.

Moved to PH...

Magnus213

iTrader: (1)

I've had mine for a couple days and it seems like the throttle response may be marginally better. Then again, that's probably because I can hear the engine revving up much more now, plus I like to drive a little quicker to hear the marvelous sound.

hahaitzskippy

.5-1.5 hp

acasanova

Axlebacks yield from 4 to 5.66hp on the TC. Go to this link and read the graphs. https://www.scionlife.com/forums/viewtopic.php?t=80070