Page 526 - 2018 Racecar Engineering Drag Racing Parts and Accessories Catalog

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 Big Block Chevy 396-454
PGEB4.1V6C 2-Bolt Center Main Caps, 2 Cap Set PGEBB454C Direct Replacement Main Caps (4), 4-Bolt Caps/4-Bolt Blocks
Small Block Chevy 265-350 PGEBB454CFA Angled Center Main Caps (3), 4-Bolt Caps/2-Bolt Block
PGESB350CFS4 350 Center Caps, OEM Replacement, 4-Bolt Caps/4-Bolt Blocks PGEBB454F Front 4-Bolt Main Bearing Cap, Also Fits “Bow Tie” Block
PGESB350CSA2 350 Splayed Center Caps, 4-Bolt Caps/2-Bolt Blocks Small Block Chrysler 340-360
350 Step Bottom Angle Caps For Sm. Journal 283-327 With Stock PGEM340C4A 340 4-Bolt Splayed Center Main Caps, Fits OEM Or Race Blocks
PGESB350CSA4
Register PGEM360C4A 360 4-Bolt Splayed Center Main Caps
PGESB350CFA 350 Flat Bottom Angle Caps For Blocks With 2-/4-Bolt Register Big Block Chrysler 383-440
PGESB350F 327-350 (Large Journal) Front Main Bearing Cap, 2-Bolt PGEM3840F 383-440 2-Bolt Front Main Cap
350 Rear Main Bearing Cap, 2-Pc. Rear Main Seal, PGEM3840C2 383-440 2-Bolt Center Main Caps
PGESB350RWS
Wet Sump App. PGEM3840C4 383-440 Cross Bolt Center Main Caps
350 Late Rear Main Bearing Cap, 1-Pc. Rear Main Seal, PGEM3840R 383-440 2-Bolt Rear Main Cap
PGESB350RWSL Small Block Ford 289-302
Wet Sump App.
283-350 (Large/Small Journal) Rear Main Cap Support Strap, Dry PGEF289F Front Main Cap For 289-302
PGESB350RSDS Ford 351C
Sump App.
PGESB350RSWS 350 Rear Main Cap Support Strap, Wet Sump App. PGEF351CC 4-Bolt Flat Bottom Center Main Caps For 351C
PGESBFS Front Main Cap Support Strap Big Block Ford 390-428 “FE”
Small Block Chevy 400 PGEF427C-4 Cross Bolt Center Caps
PGESB400CFA 400 Flat Bottom Angled Caps, 4-Bolt Caps/2-Bolt Blocks Big Block Ford 429-460
PGESP400CSR 400 Stock Replacement 4-Bolt Center Caps PGEF460CFA Flat Bottom Splayed Center Caps For Standard 429-460 And SVO
PGESB400CSA 400 Splayed Center Caps, 4-Bolt Caps/2-Bolt Blocks 460 Blocks
PGESB400F 400 Front Main Bearing Cap, 2-Bolt Pontiac 389-455
PGESB400RSDS 400 Rear Main Cap Support Strap, Dry Sump App. PGEP400C 4-Bolt Center Main Caps For 389-400
PGESB400RSWS 400 Rear Main Cap Support Strap, Wet Sump App. PGEP400C4A 4-Bolt Splayed Center Cap For 389-400
PGESBFS Front Main Cap Support Strap PGEP455C 4-Bolt Center Main Caps For 421-455
Small Block Chevy Gen. III 5.7L LS1
PGESBLS1 5.7L LS1 Main Caps, 5-Pc. Set
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. Bore Stroke Rod Length Comp. Ht. Comp. Ratio Part No. Bore Stroke Rod Length Comp. Ht. Comp. Ratio
SB Chevy 350 23° Hollow Dome SB Chevy 350 23° Reverse Dome
WPTPTS502A3 4.030” 3.480” 5.700” 1.560” 12.0:1 WPTPTS508A3 4.030” 3.480” 5.700” 1.560” 9.6:1
WPTPTS502A4 4.040” 3.480” 5.700” 1.560” 12.2:1 WPTPTS508A6 4.060” 3.480” 5.700” 1.560” 9.8:1
WPTPTS502A6 4.060” 3.480” 5.700” 1.560” 12.2:1 WPTPTS509A3 4.030” 3.480” 6.000” 1.260” 9.6:1
SB Chevy 350 23° Flat Top (2-Valve Pockets) WPTPTS509A6 4.060” 3.480” 6.000” 1.260” 9.8:1
WPTPTS503A3 4.030” 3.480” 5.700” 1.560” 9.8:1 SB Chevy 400 23° Flat Top (2-Valve Pockets)
WPTPTS503A6 4.060” 3.480” 5.700” 1.560” 10.0:1 WPTPTS507A3 4.155” 3.480” 5.700” 1.560” 11.6:1
WPTPTS504A3 4.030” 3.750” 5.700” 1.425” 10.5:1 WPTPTS507A4 4.165” 3.480” 5.700” 1.560” 11.6:1
WPTPTS504A6 4.060” 3.750” 5.700” 1.425” 10.7:1 WPTPTS510A3 4.155” 3.750” 5.700” 1.425” 11.6:1
WPTPTS505A3 4.030” 3.480” 6.000” 1.260” 9.8:1 WPTPTS510A4 4.165” 3.750” 5.700” 1.425” 11.6:1
WPTPTS505A6 4.060” 3.480” 6.000” 1.260” 10.0:1 SB Chevy 400 23° Hollow Dome
WPTPTS506A3 4.030” 3.750” 6.000” 1.125” 10.5:1 WPTPTS535AS 4.125” 3.750” 6.000” 1.125” 13.3:1
WPTPTS506A4 4.040” 3.750” 6.000” 1.125” 10.5:1 WPTPTS535A4 4.165” 3.750” 6.000” 1.125” 13.6:1
WPTPTS506A6 4.060” 3.750” 6.000” 1.125” 10.5:1 BB Chevy 454 Open Chamber Hollow Dome
WPTPTS514A6 4.310” 4.000” 6.135” 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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