Manley Retainers and Keepers

Set of 12 Manley 4140 chromemoly steel retainers and machined keepers, made in the USA. 13% lighter than stock per valve and more consistant install height than Comp.  Manley shaved the top of the retainer to be flush with the keepers, which gives more clearance between the retainer and the rocker…

PAC 1215 Valve Spring Set

Set of 12 PAC 1215 springs. This USA made beehive spring is a drop in replacement for 3100, 3400, and 3500 engines, with a 1.700" Install height  Drop in with matching retainers for the Gen 2 2.8/3.1 Aluminium head engines, using the same stock 1.700" install height.  3.5/3.9 VVT engines also use…

PAC 1218 Valve Spring Set

Set of 12 PAC 1218 springs.  This USA made beehive spring is a drop in replacement for 3100, 3400, and 3500 engines, with a 1.700" Install height  Drop in with matching retainers for the Gen 2 2.8/3.1 Aluminium head engines, using the same stock 1.700" install height.  3.5/3.9 VVT engines also us…

PAC 1286 Valve Spring Set

Set of 12 PAC 1286 springs.  This USA made beehive spring is a drop in replacement for 3100, 3400, and 3500 engines, with a 1.700" Install height  Drop in with matching retainers for the Gen 2 2.8/3.1 Aluminium head engines, using the same stock 1.700" install height.  3.5/3.9 VVT engines also us…

Comp 26986 Valve Springs

Set of 12 Comp 26986 Valve Springs.  Drop in fit for all aluminum head 60V6 pushrod engines.  Uses the same retainers as 3100, 3400, 3500, and fits the stock seat/seal combination as well as the Gen 2 2.8/3.1 MPFI Aluminum head setups.  Recommended for its ease of installation for all Stage 1 des…

Comp 26915 Valve Springs

Set of 12 Comp 26915 Valve Springs.  These springs will fit the stock 3100/3400/3500 valve spring seat/seal combination, or you can run our LS style seat and seals.  3500/3900 VVT engines can use the stock seat/seal without any interference due to the smaller .500" OD valve guide. 105 @ 1.80…

Comp 26918 Valve Springs

Set of 12 Comp 26918 Valve Springs.  LS style seat with matching seals for your size guide OD are recommended for 3100, 3400, and 3500.  Stock 3500/3900 VVT engine seat/seal combination are fine since they have a .500" OD guide.  Stock 3100/3400/3500 seat/seal combination require a bit of effort …

Stock 3x00 Valve Stem Seals

Stock replacement viton seat/seal combination for all Gen 3 engines.  1994-1999 3100 and 3400 use the .520 OD guide seal.  All 2000 and newer 3100, 3400, and 3500 use the .553 OD guide seal.  Please specify which set you need in the options above.

Valve Stem Seals for LS1 Seats

For valve springs that require the LS1 seats to be use, a non stock valve stem seal is required.  There are 2 versions available, for .520" and .553" OD valve guides.  94-99 3100 and 3400 engines use the orange .520" stock seals.  Everything 2000 and newer use the blue .553" stock seals …

Valve Spring Seats for LS Springs

Hardened 4140 chromoly steel with a black oxide coating for durability.  These seats fit the Gen 2 and Gen 3 60V6 heads for use with any of our beehive performance springs.  Sold in a set of 12

3500 V6 Valves (LX9)

Stock replacement valves for the 3500 engine. 1.76" intake and 1.42" exhaust, like all 3400 and 3500 motors, and the 2000 and newer 3100.  2.8/3.1 aluminum head and 94-99 3100 SFI owners can upgrade to the larger intake size once a valve job has been performed.  This valve set offers reduced we…