VALVE COVER COMPONENTs Hardware and Breathers Part Number Description Technical Notes 88962074 Oil Baffle Tube (not shown) Pushes easily into most valve covers that have an oil baffle; Requires breather P/N 25534355, used on ZZ572 engines 25534355 ZZ572 Breathers Special breathers for the ZZ572 valve covers; Chrome breathers are 1-3/8", hose-clamp-style with the Bowtie logo on top; Use with oil baffle tube P/N 88962074; Includes 2 breathers 12341993 Push-In Oil Filler Cap For valve covers with 1.220" hole 19131218 Chrome Push-In Breather (not shown) 2-3/4" O.D. x 1-1/2" tall with 3/4" nipple; Use with rubber grommet P/N 3894337 3894337 Rubber Grommet – Bowtie Valve Covers (not shown) Has 15/16" I.D. x 17/32" O.D.; Can be used to plug the oil filler hole in Bowtie valve covers or to mount a push-in breather 19433398 Valve Cover Gasket (not shown) Steel-reinforced gasket fits all Big-Block Chevy valve covers; Order 2 per engine Valve Cover Badges Part Number Description Technical Notes 12363952 Valve Cover Badge – “454” (not shown) Designed to fit mounting area on valve covers P/N 12495488 (see page 198), but these good-looking badges will also fit some other Big-Block valve covers. NOTE: 1 badge per package. Order 2 per engine. 12363953 Valve Cover Badge – “502” Designed to fit mounting area on valve covers P/N 12495488 (see page 198), but these good-looking badges will also fit some other Big-Block valve covers. NOTE: 1 badge per package. Order 2 per engine. Rocker Arm studs and Accessories Part Number Description Technical Notes 3896648 Rocker Adjusting Nut Positive locking 7/16"–20 nut for all Big-Block V-8s Rocker Adjusting Nut Valve Cover Badge – “502” Push-In Oil Filler Cap ZZ572 Breathers Valve Covers: Additional Required Components Part Number Gaskets (Qty) Bolts (Qty) Grommets (Qty) Oil Fillers (Qty) Engine Application 12342093 19433398 (2) 88961871 (4) 12341988 (1) 12341993 (1) 12499121, 19433162, 19433160, Mark IV, V, VI BB 12495488 19433398 (2), OR Mark IV, V, VI (2) 25520079 10198941 OR 3989350 15681150 12499121, 19433162, 19433160, Mark IV, V, VI BB 12371244 19433398 (2) 88961871 (4) N/A 12341993 (1) 19331583, 19331581, 19331583, 19331585, 19331581 25534374 19433398 (2) 88961871 (4) N/A 12341993 (1) 19331583, 19331581, 19331583, 19331585, 19331581 12499200 19433398 (2) 88961871 (4) 12341988 (1) 12341993 (1) 19331583, 19331581, 19331583, 19331585, 19331581 19202588 19433398 (2) 88961871 (4) 12341988 (1) 12341993 (1) 19331583, 19331581, 19331583, 19331585, 19331581 19202589 19433398 (2) 88961871 (4) 12341988 (1) 12341993 (1) 19331583, 19331581, 19331583, 19331585, 19331581 199 BIG-BLOCK COMPONENTs 19421390 Valve Covers – Orange with “632” - Used on the ZZ632 crate engine and can be used on all Big-Block cylinder heads - Cast aluminum construction with integrated oil fill on one cover and a breather outlet on the other - Chevy Orange finish with raised and machined “632” logo and fins - Includes 2 covers and 2 grommets NOTE: Requires push-in oil cap P/N 12341993, breather P/N 25534355 and breather tube P/N 88962074, which incorporates a baffle in the tube. 19421392 Valve Covers – Orange with “Chevrolet Bowtie” (not shown) - Similar to cover design P/N 19421390 above, but with the Chevrolet Bowtie logo - Can be used on all Big-Block cylinder heads 19421388 Valve Covers – Black with “502” - Similar to cover design P/N 19421390 above, but with black finish and “502” logo - Can be used on all Big-Block engines 19421393 Valve Covers – Black with “Chevrolet Bowtie” - Similar to cover design P/N 19421390 above, but with black finish and Chevrolet Bowtie logo - Can be used on all Big-Block cylinder heads Additional components required for installation. See chart above.
