15lbs of boost...do I need back pressure with a muffler?
A muffler is not needed specificially but it might help you out when it comes to cops, and you wont see much of a power gain without one or much of a tone difference. It all just comes down to personal preference.
Thread
Thread Starter
Forum
Replies
Last Post
Sooby
Scion tC 1G Wheel & Tire
11
Apr 8, 2020 11:51 PM
Jumphiggggg
Scion tC 1G Drivetrain & Power
0
Feb 13, 2015 04:05 PM
PTUNING
PPC: Engine / Drivetrain
3
Dec 11, 2014 08:09 PM
DjFrOsT
Scion xA/xB 1st-Gen Drivetrain & Power
7
Dec 13, 2003 04:18 AM






