Oldsmobile (330, 350, 403, 400, 425, 455) Valve Cover Spacers 1" ... SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum * Stud Kit not included with 1" spacers - look in Stud Kits for your specific application. Buy Now

Oldsmobile (330, 350, 403, 400, 425, 455) Valve Cover Spacers 1/2" ... Includes stainless steel bolts and washers  SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum Buy Now

Oldsmobile (330, 350, 403, 400, 425, 455) Valve Cover Spacers 3/8" ...   Includes stainless steel bolts and washers  SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum Buy Now

Oldsmobile (330, 350, 403, 400, 425, 455) Valve Cover Spacers with Evacuation Ports 1" ... These Spacers are engineered with an additional port on the rear intake manifold side  of the head on each side of the motor taped to take a 3/8 pipe fittings to be used for Evacuation Port SOLD IN SETS (Two Spacers) Made in the U.S.A. from 100% U.S.A. Billet Aluminum * Stud Kit not included with 1" spacers - look in Stud Kits for your specific application. Buy Now