BIG-BLOCK ENGINE INTAKE VALVES
12556317
- Valve Size: 2.190" / Stem Size: 3/8"
- Stock replacement valve for Gen-V and Gen-VI 454 and 502 HO engines
12366986
- Valve Size: 2.190" / Stem Size: 11/32"
- Stainless-steel valve with undercut chrome-plated stems, single-groove design, hardened tips
- Used on ZZ454, ZZ427, and the Anniversary Edition 427 crate engines
12366987
- Valve Size: 2.250"/ Stem Size: 11/32"
- Stainless-steel valve with undercut chrome-plated stems, single-groove design, hardened tips
- Used on ZZ502 and ZZ572
BIG-BLOCK EXHAUST VALVES
14097049
- Valve Size: 1.880" / Stem Size: 3/8"
- Stock replacement valve for Gen-V and Gen-VI 454 and 502 HO engines
12366988
- Valve Size: 1.880" / Stem Size: 11/32"
- Stainless-steel valve with undercut chrome-plated stems, single-groove design, hardened tips
- Used on ZZ454, ZZ427, and the Anniversary Edition 427 crate engines
88963128
- Valve Size: 1.880"/ Stem Size: 11/32"
- Stainless-steel valve with undercut chrome-plated stems, single-groove design, hardened tips
- Used on ZZ502 and ZZ572
BIG-BLOCK VALVE SPRINGS
88963934
DUAL SPRING
- Outside Diameter: 1.540"
- Pressure Installed at Height: 197 lbs. @1.800"
- Retainer P/N 12366990
- Valve Seal Kit P/N 88963936
- Used with 572-/620-HP engines
- 1 valve spring; order 16 per engine
19172596
DUAL SPRING
- Outside Diameter: 1.567"
- Pressure Installed at Height: 230 lbs. @2.000"
- Retainer P/N 12366990
- Valve Seal Kit P/N 88963936
- Used with 572-/720-HP engines
- 1 valve spring; order 16 per engine
BIG-BLOCK VALVE SPRING COMPONENTS
12550421
VALVE SPRING RETAINER
- For 1991 and newer Gen-V and Gen-VI engines
3947880
VALVE SPRING KEY
- Hardened steel split locks for production and racing engines. Color-coded purple. Sold individually; order 32 per engine.
12550422
VALVE STEM SEAL
- Seal for 1991 and newer Gen-V and Gen-VI engines. The valve guide boss must be machined slightly for seal to retain clearance when using high-lift cams.
88963936
VALVE SPRING SEAL
- Use with all 572 engines
3875916
SPRING SHIM
- 55/64" I.D. x 1 31/64" O.D. x 0.015" thick
88963937
SPRING SHIM
- Shim for all 572 engines
88963935
VALVE SPRING LOCATOR
- Valve spring locator for setting the valve spring in the right location on all 572 engines
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