12511890 Valve stem seal kit

•  Late-model V-8 seal kit for 11/32" diameter valve stems
•  Includes eight intake seals, eight exhaust seals and 16 oil stem seals 

NOTE: Check for seal-to-guide interference with high-lift cams.

Price: $49.15

10212810 - Valve stem seal 

• Used on LT4 and ZZ4 heads as well as Chevrolet Performance Parts head assemblies P/N 25534421, 25534431, 12363287 and 12464298.

Price: $2.68

10241744  - Valve spring retainer 

• Used on 350 HO, 350 Ram Jet and HT383

Price: $3.30

10045007 - Valve spring retainer 

• For all ZZ3 series engines 

NOTE: When converting ZZZ, ZZ1 or ZZ2 engines to ZZ3 series cap, valve spring shield must be removed and add cap P/N 10045007, seal P/N 460483, and spacer P/N 10185066.

3875916 - Spring shim

• 55/64" I.D. x 1-31/64" O.D. x 0.015" thick

Price: $1.74

10212809 - LT4 Valve Spring Shim 

• Lightweight shims as used on 1996 LT4 Corvette special LT service heads P/N 12363287, and Fast Burn heads
• Use with spring P/N 12551483

Price: $1.67

19171528
LT 4 Valve Spring Cap Kit

• Kit for 5.7L LT4 engines
• Includes 16 P/N 10212808 lightweight retainers
• Use with spring kit P/N 12495494 and key kit P/N 12495503
• Used on ZZ4, Fast Burn, LT4 and iron Vortec Bowtie heads

Price: $28.61

19169661
Heavy Duty Vortec Valve Spring Retainer

• Fits Fast Burn and Vortec Bowtie cylinder heads
• Designed for circle track racing

Price: $7.47

12495503
Valve Spring Key Kit

• Kit includes 32 keys of P/N 24503856 for 11/32" valve stems
• Use on all Small-Block V-8 engines

Price: $24.07