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2009 G8 GT lifter tick
williamGT
823 views
G8 GT lifter tick
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2008 Grand Prix GXP
williamGT
683 views
Custom catless downpipe, magnaflow cat-back W/O resonator
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Grand Prix GXP Headers (take off)
williamGT
1,081 views
Doug Thorley headers, Hogan catted downpipe, magnaflow cat-back w/o resonator.
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Grand Prix GXP Headers
williamGT
2,925 views
Doug Thorley Headers, 3inch hogan downpipe with High-Flow cat, Magnaflow cat-back W/0 resonator, K&N Intake and Airraid TBS.
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Grand Prix GXP
williamGT
334 views
Doug Thorley Headers
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Grand Prix GXP Magnaflow cat-back
williamGT
276 views
5.3L V8...3inch hogan downpipe with magnaflow high-flow cat, Magnaflow cat-back with-out resonator.
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Grand Prix GXP Exhaust
williamGT
2,248 views
2008 Pontiac Grand Prix GXP with, K&N intake, AirRaid TBS, 3inch Hogan downpipe with magnaflow high flow cat and magnaflow cat-back without resonator.
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Grand Prix GXP magnaflow cat-back and hogan catted downpipe
williamGT
2,271 views
2008 Grand Prix GXP with Magnaflow cat-back, hogan 3inch down pipe with magnaflow high-flow cat, Air Raid TBS and K&N intake
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2008 Grand Prix GXP Exhaust
williamGT
5,304 views
Hooker aerochamber muffler. without resonator and stock GXP tips.
Sounds like flowmaster super 40's without the raspy noise.
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2008 Grand Prix GXP Magnaflow catback
williamGT
44,493 views
08 Grand Prix GXP 5.3L (LS4) Magnaflow cat-back.....Louder in person
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