Manifold Studs & Nuts
Buick
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-196 3/8 x 3-1/4 8 Cyl-4.4(267), 5.0(305), 307, 5.7(350) XAO-574 3/8-16 x 5/16 1968-93
XAO-180 3/8 x 2-7/32 -4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1968-93
XAO-200 3/8 x 3-5/16 -4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1968-93
Chevrolet
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-196 3/8 x 3-1/4 8 Cyl-262, 265, 4.4(267), 283, 302, 5.0 XAO-574 3/8-16 x 5/16 1955-93
(305), 307, 327, 5.7(350), 400
XAO-180 3/8 x 2-7/32 -262, 265, 4.4(267), 283, 302, 5.0 XAO-575 3/8-16 x 5/8 1955-93
(305), 307, 327, 5.7(350), 400
XAO-200 3/8 x 3-5/16 -262, 265, 4.4(267), 283, 302, 5.0 XAO-575 3/8-16 x 5/8 1955-93
(305), 307, 327, 5.7(350), 400
XAO-180 3/8 x 2-7/32 -366, 396, 400(bbl.), 402, 427, 454 XAO-575 3/8-16 x 5/8 1965-93
XAO-200 3/8 x 3-5/16 -366, 396, 400(bbl.), 402, 427, 454 XAO-575 3/8-16 x 5/8 1965-93
Chrysler (Domestic Models)
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-168 3/8 x 2 6 Cyl-170, 196, 225 XAO-584 3/8-24 x 5/16 1960-82
Ford
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-168 3/8 x 3-1/4 4 Cyl - 1600 XAO-584 3/8-24 x 5/16 1971-73
XAO-221 7/16 x 2-1/4 6 Cyl - 223 XAO-586 7/16-20 x 3/8 1964-92
XAO-168 3/8 x 2 - All XAO-584 3/8-24 x 5/16 1949-51
XAO-228 7/16 x 2-1/4 8 Cyl. - 239, 272, 292, 312 XAO-586 7/16-20 x 3/8 1955-64
Nissan / Datsun
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-352 10mm x 52mm 4 & 6 Cyl - All XAO-598 10mm-1.50 1968-87
Oldsmobile
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-196 3/8 x 3-1/4 8 Cyl-4.4(267), 5.0(305), 307, 5.7(350) XAO-574 3/8-16 x 5/16 1977-93
XAO-180 3/8 x 2-7/32 -4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1977-93
XAO-200 3/8 x 3-5/16 - 4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1977-93
XAO-164 3/8 x 1-3/4 - 260P, 307Y, 350N, 350R, 403 XAO-584 3/8-24 x 5/16 1965-88
XAO-168 3/8 x 2 - 260P, 307Y, 350N, 350R, 403 XAO-584 3/8-24 x 5/16 1965-88
XAO-340 8mm Length 40 1.25 Thread Pitch
XAO-350 8mm Length 45 1.25 Thread Pitch
Pontiac
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-168 3/8 x 2 6 Cyl - All XAO-584 3/8-24 x 5/16 1933-54
XAO-164 3/8 x 1-3/4 - All XAO-584 3/8-24 x 5/16 1933-54
XAO-196 3/8 x 3-1/4 8 Cyl-4.4(267), 5.0(305), 307, 5.7(350) XAO-574 3/8-16 x 5/16 1976-92
XAO-180 3/8 x 2-7/32 -4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1976-92
XAO-200 3/8 x 3-5/16 -4.4(267), 5.0(305), 307, 5.7(350) XAO-575 3/8-16 x 5/8 1976-92
XAO-168 3/8 x 2 - All XAO-584 3/8-24 x 5/16 1933-54
Toyota
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-359 10mm x 41mm 4 & 6 Cyl - All XAO-596 10mm-1.25 1969-87
Volkswagon
ERSCO# Stud Size Make-Engine ERSCO# Nut Size Year
XAO-339 8mm x 21mm 4 Cyl. - Air-cooled XAO-594 8mm-1.25 1957-79