Allstar Performance Spark Plug Index Shims 14mm Small O.D. | ALL96506 1972-nissan-510-esi7304811 Please note

Please note

For Garrett G42

This listing is for the Blue XX-Large

This listing is for the Blue X-Large

Measured Flow: 505 CFM @ 7" H20

Allstar Performance Spark Plug Index Shims 14mm Small O.D. | ALL96506 1972-nissan-510-esi7304811 Please noteAllstar Performance's small OD spark plug index shims are stackable washers that rotate the spark plug's ground strap in 30 degree increments up to 360 degrees for improved piston dome clearance. This small outside diameter version is sized specifically for ALL PRO cylinder heads and uses 14mm flat seat plugs. Set of 24 shims: 12 silver 60 degree and 12 black 90 degree. Compatibility: Sized for ALL PRO cylinder heads; fits 14mm flat seat spark plugs.