K4125A

2004-2005 CHEVY/GMC 6.6L LLY DURAMAX DIESEL 2500/3500 K4125A - FOR '04-'05 CHEVY 4" STAINLESS - CAT BACK DUAL W/TDP K4125A – FOR 2004 & 2005 – CHEVY/GMC 6.6L LLY DURAMAX DIESEL 2500/3500 (ALL CAB AND BED LENGTHS) – 4″ 409...

K4125S

2004-2005 CHEVY/GMC 6.6L LLY DURAMAX DIESEL 2500/3500 K4125S - FOR '04-'05 CHEVY 4" STAINLESS - CAT BACK DUAL W/TDP K4125S – FOR 2004 & 2005 – CHEVY/GMC 6.6L LLY DURAMAX DIESEL 2500/3500 (ALL CAB AND BED LENGTHS) – 4″ 409...