The mufflers that i've used the shorter the mufflers are ussauly louder than longer one, all depends on what kind that you buy. One with baffles or free flowing.
I've never used silverline. I say open it up all the way no muffler no cat, is loud but sounds great.
1997 F350 Crew Cab, 7.3, 4x4, 5SP Short Shift kit, 5" RSK SD V Code springs, DIY Intake, 5" Exhaust with 30" FTE Resinator, intercooled, TS chip.
If I was going to run a muffler,,, It would be the "Aero turbine" for sound alone, (And they are very short) BUT I SERIOUSLY doubt it increases performance at all, (No one can convince me otherwise either,, if there are any "Sponsors" on here for them,, (Someone on another forum SWORE it would increase it by evacuating the exhaust or some crap ON A TURBO CHARGED MOTOR?) BUT for the ridiculous price they ask, sound is not that important to me,, so I love my STRAIGHT PIPE.
*48* Jim T. 2011 F-350 Lariat, CC, LB, SRW. White Platinum Metallic Tricoat. Black leather seats, I probably wont have*PMS,, with this one, at least no major attacks of it!
my truck already had a 4 inch exhaust system on it when i bought it.
silverline muff and tip.its a straight through muff,but i still dropped 40 deg on my egt's.when i straight piped it.
now the tip is another matter all toghther,it is the best looking tip out there..period..i love my silverline tip.
i cant stand rolled edges,beveled edges FTW..
[SIGPIC][/SIGPIC]2001 f250 4x4 cc sb 6 in lift...dp 6 pos..