Pro Series Billet Steel Main Bearing Caps Increase bottom end strength. Pro Series Main Bearing Caps are manufactured in the USA from premium billet steel that has undergone stringent heat treating. Many caps listed convert two-bolt main block to more durable four-bolt mains.
Part No.
Description
Part No.
Description
Buick 3.8-4.1L PGEB4.1V6C
Big Block Chevy 396-454 PGEBB454C
2-Bolt Center Main Caps, 2 Cap Set
Direct Replacement Main Caps (4), 4-Bolt Caps/4-Bolt Blocks Angled Center Main Caps (3), 4-Bolt Caps/2-Bolt Block Front 4-Bolt Main Bearing Cap, Also Fits “Bow Tie” Block
Small Block Chevy 265-350 PGESB350CFS4 350 Center Caps, OEM Replacement, 4-Bolt Caps/4-Bolt Blocks PGESB350CSA2 350 Splayed Center Caps, 4-Bolt Caps/2-Bolt Blocks PGESB350CSA4 350 Step Bottom Angle Caps For Sm. Journal 283-327 With Stock Register PGESB350CFA 350 Flat Bottom Angle Caps For Blocks With 2-/4-Bolt Register PGESB350F 327-350 (Large Journal) Front Main Bearing Cap, 2-Bolt PGESB350RWS 350 Rear Main Bearing Cap, 2-Pc. Rear Main Seal, Wet Sump App. PGESB350RWSL 350 Late Rear Main Bearing Cap, 1-Pc. Rear Main Seal, Wet Sump App. PGESB350RSDS 283-350 (Large/Small Journal) Rear Main Cap Support Strap, Dry Sump App. PGESB350RSWS 350 Rear Main Cap Support Strap, Wet Sump App. PGESBFS Front Main Cap Support Strap Small Block Chevy 400 PGESB400CFA 400 Flat Bottom Angled Caps, 4-Bolt Caps/2-Bolt Blocks PGESP400CSR 400 Stock Replacement 4-Bolt Center Caps PGESB400CSA 400 Splayed Center Caps, 4-Bolt Caps/2-Bolt Blocks PGESB400F 400 Front Main Bearing Cap, 2-Bolt PGESB400RSDS 400 Rear Main Cap Support Strap, Dry Sump App. PGESB400RSWS 400 Rear Main Cap Support Strap, Wet Sump App. PGESBFS Front Main Cap Support Strap Small Block Chevy Gen. III 5.7L LS1 PGESBLS1 5.7L LS1 Main Caps, 5-Pc. Set
PGEBB454CFA PGEBB454F
Small Block Chrysler 340-360 PGEM340C4A 340 4-Bolt Splayed Center Main Caps, Fits OEM Or Race Blocks PGEM360C4A 360 4-Bolt Splayed Center Main Caps Big Block Chrysler 383-440 PGEM3840F 383-440 2-Bolt Front Main Cap PGEM3840C2 383-440 2-Bolt Center Main Caps PGEM3840C4 383-440 Cross Bolt Center Main Caps PGEM3840R 383-440 2-Bolt Rear Main Cap Small Block Ford 289-302 PGEF289F Front Main Cap For 289-302 Ford 351C PGEF351CC 4-Bolt Flat Bottom Center Main Caps For 351C Big Block Ford 390-428 “FE” PGEF427C-4 Cross Bolt Center Caps Big Block Ford 429-460 PGEF460CFA Flat Bottom Splayed Center Caps For Standard 429-460 And SVO 460 Blocks Pontiac 389-455 PGEP400C 4-Bolt Center Main Caps For 389-400 PGEP400C4A 4-Bolt Splayed Center Cap For 389-400 PGEP455C 4-Bolt Center Main Caps For 421-455
Sportsman Series Steel Main Bearing Caps Designed as a cost effective alternative to Pro Series Main Caps, Sportsman Series Caps are made in the USA and suitable for applications with up to 600 horsepower. Part No. Description PGESP350C15S SB Chevy 350 Center Caps, 15° Splayed, 2-Bolt Blocks PGESP350CSR SB Chevy 350 Center Caps, 4-Bolt Blocks PGESP400CSR SB Chevy 400 Center Caps, 2- Or 4-Bolt Blocks
Forged Pistons Manufactured by Wiseco, ProTru forged pistons are affordable with features usually found only in more expensive pistons. Pistons are machined for 1/16" top, 1/16" second and 3/16" rings. Kits include eight pistons, chrome moly wrist pins, and a full set of spiral locks. Piston rings must be purchased separately.
Street Series Forged Pistons Part No. SB Chevy 350 23° Hollow Dome WPTPTS502A3 4.030” 3.480”
Part No.
Bore Stroke Rod Length Comp. Ht. Comp. Ratio
Bore Stroke Rod Length Comp. Ht. Comp. Ratio
SB Chevy 350 23° Reverse Dome WPTPTS508A3 4.030” 3.480” WPTPTS508A6 4.060” 3.480” WPTPTS509A3 4.030” 3.480” WPTPTS509A6 4.060” 3.480” WPTPTS507A4 4.165” 3.480” WPTPTS510A3 4.155” 3.750” WPTPTS510A4 4.165” 3.750” SB Chevy 400 23° Hollow Dome WPTPTS535AS 4.125” 3.750” WPTPTS535A4 4.165” 3.750” SB Chevy 400 23° Flat Top (2-Valve Pockets) WPTPTS507A3 4.155” 3.480” 5.700” 5.700” 5.700” 5.700” 6.000” 6.000” BB Chevy 454 Open Chamber Hollow Dome WPTPTS514A6 4.310” 4.000” 6.135” 5.700” 5.700” 6.000” 6.000”
1.560” 1.560” 1.260” 1.260” 1.560” 1.560” 1.425” 1.425” 1.125” 1.125”
9.6:1 9.8:1 9.6:1 9.8:1
5.700” 5.700” 5.700”
1.560” 1.560” 1.560” 1.560” 1.560” 1.425” 1.425” 1.260” 1.260” 1.125” 1.125” 1.125”
12.0:1 12.2:1 12.2:1 9.8:1 10.0:1 10.5:1 10.7:1 9.8:1 10.0:1 10.5:1 10.5:1 10.5:1
WPTPTS502A4 4.040” 3.480” WPTPTS502A6 4.060” 3.480”
SB Chevy 350 23° Flat Top (2-Valve Pockets) WPTPTS503A3 4.030” 3.480” 5.700”
11.6:1 11.6:1 11.6:1 11.6:1 13.3:1 13.6:1
WPTPTS503A6 4.060” 3.480” WPTPTS504A3 4.030” 3.750” WPTPTS504A6 4.060” 3.750” WPTPTS505A3 4.030” 3.480” WPTPTS505A6 4.060” 3.480” WPTPTS506A3 4.030” 3.750” WPTPTS506A4 4.040” 3.750” WPTPTS506A6 4.060” 3.750”
5.700” 5.700” 5.700” 6.000” 6.000” 6.000” 6.000” 6.000”
1.645” 10.0:1 Note: SB Chevy compression ratios are based upon 64cc combustion chamber volume. Big block Chevy compression ratio is based upon a 112cc com- bustion chamber and .020” deck height.
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