MAIN BEARING CAPS
Pro-Gram Billet Main Bearing Caps Billet main caps offer increased bottom end strength. Many of the billet caps listed are for converting a two-bolt main block to the more durable four-bolt main configuration. Part No. Description Caps Block Register AMC PGEAMC401CSA 401 V8 Splayed Center Main Caps 4-Bolt 2-Bolt Stock Step Buick PGEB4.1V6C 3.8L/4.1L V6 Center Main Caps 2-Bolt 2-Bolt Stock Step Chevrolet Small Block 327-400 PGESB350F 327-350 Front Cap, Large Journal 2-Bolt 2 and 4-Bolt Stock Step PGESB400F 400 Front Cap 2-Bolt 2 and 4-Bolt Stock Step PGESB350CFS4 350 Center Caps, OEM Rep. 4-Bolt 4-Bolt Stock Step PGESP350CSR SBC Center Main Caps Sportsman Series 4-Bolt 4-Bolt Stock PGESP350C15S 350 Splayed Center Caps 4-Bolt 2-Bolt Stock Step PGESB350CFA 350 Splayed Center Caps 4-Bolt 2 and 4-Bolt Flat PGESB350CSA2 350 Splayed Center Caps 4-Bolt 2-Bolt Stock Step PGESB350CSA4 350 Splayed Center Caps 4-Bolt 4-Bolt Stock Step PGESB400CFA 400 Splayed Center Caps 4-Bolt 2-Bolt Flat PGESP400CSR 400 Center Caps Sportsman 4-Bolt 4-Bolt Stock Step PGESB400CSA 400 Splayed Center Caps 4-Bolt 2-Bolt Stock Step PGESB350RDS 350 Rear Main Cap, Dry Sump 2-Bolt 2 and 4-Bolt Stock Step PGESB350RWS 350 Rear Main Cap, Wet Sump 2-Bolt 2 and 4-Bolt Stock Step PGESB350RWSL 350 Rear Main Cap, Wet Sump, 1-Pc. 2-Bolt 2 and 4-Bolt Stock PGESB400RWS 400 Rear Main Cap, Wet Sump 2-Bolt 2 and 4-Bolt Stock Step PGESBLS1 350 LS1 (5 Cap Set) Stock Stock Stock Step Chevrolet Big Block 396-454 PGEBB454C Direct Rep. Main Caps (4) 4-Bolt 4-Bolt Stock PGEBB454CFA Splayed Center Caps (3) 4-Bolt 2 and 4-Bolt Flat PGEBB454F Front Cap 4-Bolt 2 and 4-Bolt Flat PGEBB454RWS Rear Main Cap, Wet Sump 4-Bolt 2 and 4-Bolt Stock Chrysler Small Block 318-360 PGEM340F Front Main Cap 2-Bolt 2-Bolt Stock Step PGEM340C2 318-340 Center Main Caps 2-Bolt 2-Bolt Stock Step PGEM340C4A 318-340, Splayed Center Main Caps, Fits Production & Race Blocks 4-Bolt 2 and 4-Bolt Stock Step PGEM360C4A 360 Splayed Center Main Caps, Fits Production Blocks 4-Bolt 2 and 4-Bolt Stock Step Chrysler Big Block 383-440 PGEM3840C2 Center Main Caps 2-Bolt 2-Bolt Stock Step PGEM3840F Front Main Caps 2-Bolt 2-Bolt Stock Step PGEM3840R Rear Main Caps 2-Bolt 2-Bolt Stock Step PGEM3840C4 Cross Bolt Center Main Caps 2-Bolt 2-Bolt Stock Step Dodge Viper V10 PGEDGE-VIPER Main Cap Set, Cross Bolt 4-Bolt 4-Bolt Stock Step GM Duramax PGEGM66DMX Main Cap Set 2-Bolt 2-Bolt Stock Step Ford Small Block 289-302 PGEF351CWFA 351W Flat Bottom Splayed Center Caps 4-Bolt All Blocks — PGEF302CFAL 5.0L Splayed Center Caps, Flat Bottom 2-Bolt 2-Bolt — PGEF289F 289 Front Cap 2-Bolt 2-Bolt — Ford 351C/M PGEF351CC Flat Bottom Center Caps 4-Bolt 2-Bolt — PGEF351CF Front Main Cap 4-Bolt 4-Bolt Stock Step PGEF351CR4B Rear Main Cap 4-Bolt 4-Bolt Stock Step PGESB350CFS4 Howards Main Caps Billet main caps are CNC-machined from low-carbon 1020 material. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. Splayed caps feature 10° angled outer holes to positively reinforce and tie the block together. Part No. Application Caps Block Register HRCH350F SBC Front Main Cap 2-Bolt 2 or 4-Bolt Stock HRCH350FS SBC Front Main Cap Support Strap — — — HRCH350RSWS SBC 350 Rear Main Cap Support Strap — — — HRCH350RWS SBC 350 Rear Main Cap - Wet Sump 2-Bolt 2 or 4-Bolt Stock HRCH350R SBC 350 Center Main Caps 4-Bolt 4-Bolt Stock HRCH350S SBC 350 Splayed Center Caps 4-Bolt 2-Bolt Stock HRCH454 BBC Center Main Caps 4-Bolt 2-Bolt Stock Steel Main Caps (Cont.)
2018 ENGINE BUILDER CATALOG
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