2004. 5-05 6. 6L LLY GM Duramax Exhaust Kits - Diesel Power Products We offer several different configurations for your new exhaust kit We offer a cat back system, for those looking for a simple installation with great sound, as well as a turbo direct pipe back that eliminates the catalytic converter, considered an "off-road" kit
MBRP 4 Armor Lite Cat Back Exhaust S6000AL – DmaxStore Get better power and sound from your 2001-2005 Chevy GMC LB7 LLY 6 6L 2500HD 3500HD with this cat back exhaust from MBRP Shop at DmaxStore for your Duramax needs
LLY Duramax Exhaust Systems Upgrades Upgrade your 2004 5–2005 LLY Duramax with a high-performance exhaust system built for maximum flow, lower EGTs, and aggressive sound Crafted from durable stainless or aluminized steel, these systems improve horsepower, torque, and fuel efficiency while resisting rust and corrosion
Duramax LLY MBRP 4 Cat-Back Exhaust (04-05) This exhaust system for the LLY from MBRP is a 4" aluminum cat-back exhaust with a muffler It's the most budget friendly exhaust upgrade tailored specifically towards the LLY
DIAMOND EYE K4120S 4 STAINLESS CAT-BACK EXHAUST (LLY 2004–2005) | CPP . . . DIAMOND EYE K4120S is a 4 0" 409 stainless steel CAT-BACK exhaust system for 2004–2005 Chevy GMC Silverado Sierra 2500 3500 with the 6 6L LLY Duramax (all cab bed) It delivers lower EGTs, a deep tone with the included muffler, and durable 16-gauge T409 stainless construction