Main Bolt Kits
MB-350 Main Bolts (260-403)
$119.00
6 point 170,000 psi main bolts and ground washers for 260-403 Oldsmobile V8 engines (except 330 & 350 diesels). Replaces stock main bolts.
MB-355 Main Bolts w/Standoff Studs (260-403)
$89.00
6 point 170,000 psi tensile strength main bolts with standoff studs for 260-403 Oldsmobile engines (except 330 & 350 diesel). Standoff studs for the No. 4 main so you can use the WT-204 or factory Toronado style short windage tray.
MB-455 Main Bolts (400-455, 350 Diesel)
$119.00
6 point 170,000 psi main bolts and ground washers for 400, 425, 455 and 350 Diesel Oldsmobile V8 engines. Replaces stock main bolts.
MB-460 Main Bolts (400-455, 350 Diesel)
$119.00
6 point 170,000 psi main bolts and ground washers for 400, 425, 455 and 350 Diesel Oldsmobile V8 engines.Fits all big block V8’s so you can use the WT-204 short style windage tray or factory Toronado style short windage tray.
