Ok guys I done a muffler delete and I cleaned the intake 2 weeks ago. Now the problem is I'm constantly getting a P0420 code I checked everything no leaks in exhaust or anything. So I scheduled an appointment at the dealer just wondering if they will try to say the muffler delete caused it...
Well decided it was time to pick up a another truck. Ended up getting a black 2007.5 6.0 vortec max crew silverado ltz.
Mods so Far:
2011 ltz split grille
air aid mit intake tube
K&N drop in Filter
Cleared headlights
LED turn signals
2.5 tgc level
Antenna relocated
billet bowtie...
2007
auto
awesome
black
cam
change
engine
filter
fortplainman
led
ltz
mufflerdelete
nbs
nnbs
paint
post
red
silverado
stock
tails
tires
truck
tune
wheels
z71
Ive been woundering if taking off my muffler on my nnbs would have negative effects on my gas economy? Is there a major loss of back pressure? If you have done it how badass does it sound lawlz
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