Pontiac Montanabefore: 1999 Pontiac Montana Exhaust Aftermarket Muffler $250, Walker Heavy Duty $350 or Walker Commercial $450after: 1999 Pontiac Montana Exhaust Aftermarket Muffler $250, Walker Heavy Duty $350 or Walker Commercial $450before: 2007 Pontiac Montana Exhaust Flange Gasket Spring Kit $150after: 2007 Pontiac Montana Exhaust Flange Gasket Spring Kit $1502008 Pontiac Montana Exhaust Aftermarket Muffler $250, Walker Heavy Duty $350 or Walker Commercial $4502008 Pontiac Montana Frame Rust Welding Job $500 each sideLand Rover →