Oldsmobile 350 400 403 425 455 Flat Guide Plates (3/8" Pushrod - 7/16" S/H 1Pc.) Pinit $18.00 SKU: PCE251.1001 You need guideplates to keep your pushrods from deflecting under high-rpm conditions. That's just what our Speedmaster guideplate sets do, they are made from 5140 Chromoly steel, nitrided and black oxide coated for corrosion and wear resistance. Quantity -+ Add to Cart Details Brand:SpeedmasterPart Number:PCE251.1001Part Type:GuideplateGuideplate Pushrod Size:3/8 in.Guideplate Style:FlatGuideplate Material:SteelGuideplate Fi... DetailsBackDetailsBrand:SpeedmasterPart Number:PCE251.1001Part Type:GuideplateGuideplate Pushrod Size:3/8 in.Guideplate Style:FlatGuideplate Material:SteelGuideplate Finish:Black oxideStud Size:7/16 in.Machine Work Required:NoQuantity:Sold as a set of 8.See MoreSee Less