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Chevy Big-block v-8<br />
Breathers and Hardware<br />
88962074<br />
Oil Baffle Tube (not shown)<br />
• Pushes easily into most valve covers that have an oil<br />
baffle<br />
• Requires breather P/N 25534355, used on ZZ572 engines<br />
A. 25534355<br />
ZZ572 Breather<br />
• Special breathers for the ZZ572 valve covers<br />
• Chrome breathers are 1-3/8", hose-clamp-style w<strong>it</strong>h the<br />
Bowtie logo on top<br />
• Use w<strong>it</strong>h oil baffle tube P/N 88962074<br />
• Includes 2 breathers<br />
B. 12341993<br />
Push-In Oil Filler Cap<br />
• For valve covers w<strong>it</strong>h 1.22" hole<br />
19131218<br />
Chrome Push-In Breather (not shown)<br />
• 2-3/4" O.D. x 1-1/2" tall w<strong>it</strong>h 3/4" nipple<br />
• Embossed Bowtie logo; use w<strong>it</strong>h rubber grommet<br />
P/N 3894337<br />
3894337<br />
Rubber Grommet, Bowtie Valve Covers<br />
(not shown)<br />
• Has 15/16" I.D. x 17/32" O.D.<br />
• Can be used to plug the oil filler hole in Bowtie valve<br />
covers or to mount a push-in breather<br />
14085759<br />
Valve Cover Gasket (not shown)<br />
• Steel-reinforced gasket f<strong>it</strong>s all Big-Block Chevy valve covers<br />
• Order 2 per engine<br />
Valve Cover Badges<br />
Designed to f<strong>it</strong> mounting area on valve covers P/N 12495488 (see<br />
page 250), these good-looking badges will f<strong>it</strong> some other Big-<br />
Block valve covers.<br />
NOTE: 1 badge per package. Order 2 per engine.<br />
12363951<br />
Valve Cover Badge, “427-Cubic-Inches"<br />
(not shown)<br />
12363952<br />
Valve Cover Badge, “454-Cubic-Inches"<br />
(not shown)<br />
A<br />
B<br />
ZZ572 Breather<br />
Push-In Oil Filler Cap<br />
Rocker Adjusting Nut<br />
Rocker Arm Stud K<strong>it</strong> (1960-1990 engines)<br />
C<br />
D<br />
Rocker Arm Studs and Accessories<br />
C. 3896648<br />
Rocker Adjusting Nut<br />
• Pos<strong>it</strong>ive locking 7/16–20 nut for all Big-Block V-8s<br />
D. 12495498<br />
Rocker Arm Stud K<strong>it</strong> (1960-1990 engines)<br />
• Strong, 7/16" diameter screw-in studs are built to stand<br />
up to stiff valve springs and high-lift camshafts<br />
• Su<strong>it</strong>able for all high-performance and <strong>com</strong>pet<strong>it</strong>ion<br />
applications<br />
• Includes 16 pieces<br />
• For single stud usage, use P/N 3921912<br />
12495518<br />
Rocker Arm Stud K<strong>it</strong> (3/8" x 7/16", not shown)<br />
• Designed for 1991-and-newer Gen V and Gen VI heads<br />
when adjustable tappets are desired<br />
• Heat-treated, 8720 steel stud has a 3/8-16 thread that<br />
screws into the head and a 7/16-20 upper shaft for the<br />
rocker arm nut<br />
• Use w<strong>it</strong>h rocker arm k<strong>it</strong> P/N 12368085 only<br />
• For single stud usage, use P/N 12368941<br />
10114123<br />
Rocker Arm Stud K<strong>it</strong> (Gen V style, not shown)<br />
• Used on the Gen V engines<br />
• Holds the “non-adjustable” rocker arms in place<br />
Guide Plates<br />
E. 3860038<br />
Pushrod Guide Plate (3/8")<br />
• Designed for all 1965-1990 iron and aluminum cylinder<br />
heads w<strong>it</strong>h 3/8" diameter pushrods<br />
• Slotted style w<strong>it</strong>h hardened steel construction aligns<br />
rocker arms w<strong>it</strong>h valve stem tips on Big-Block’s splayedvalve<br />
head<br />
• 8 required for each engine<br />
NOTE: Use w<strong>it</strong>h screw-in rocker stud P/N 3921912.<br />
3879620<br />
Pushrod Guide Plate (7/16", not shown)<br />
• Similar to guide plate described above, but for use w<strong>it</strong>h<br />
heavy-duty 7/16" diameter pushrods<br />
12562369<br />
Pushrod Guide Plate (Gen V 454/502 style,<br />
not shown)<br />
• Used on all Gen V 454 and 502 engines w<strong>it</strong>h 3/8"<br />
diameter pushrods<br />
Chevy BIG-block v-8<br />
12363953<br />
Valve Cover Badge, “502-Cubic-Inches"<br />
(not shown)<br />
12366995<br />
Valve Cover Badge, “454 GM Performance Parts”<br />
(not shown)<br />
C. 12366994<br />
Valve Cover Badge, “502 GM Performance Parts”<br />
C<br />
Valve Cover Badge, “502 GM Performance Parts”<br />
Pushrod Guide Plate (3/8")<br />
E<br />
252 Buy online at www.gmperformanceparts.<strong>com</strong><br />
Available for purchase online at<br />
gmperformanceparts.<strong>com</strong><br />
253
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