MAIN BEARING CAPS
Steel Main Caps - Cont. Billet Speedworks 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 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 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 HRCH454 BBC Center Main Caps 4-Bolt 2-Bolt Stock
PRW Billet Steel Main Bearing Caps Part No. Description
Caps
Block
Register
Chevrolet Big Block 396-454 PQX1745401
396-454 2-Bolt to 4-Bolt Block Conv. (4 Each) 396-454 2-Bolt to 4-Bolt Block Conv. (3 Each) 396-454 Splayed Center Caps (4 Each)
4-Bolt 4-Bolt 4-Bolt
2-Bolt 2-Bolt 4-Bolt
Stock Step Stock Step Stock Step
PQX1745402 PQX1745403
CRANKSHAFTS
Chevrolet Big Block “W” 409 Engine Eagle Forged Steel Crankshafts
“ESP” features SAE 4340 steel non-twist forging, multi-stage heat-treated, stress-relieved, .125" radii for use with narrowed bearings, chamfered oil holes, shot-peened, nitride hardened, X-rayed, magnafluxed, and sonic tested. Recommended for use up to 1500 HP.
Min. Rod Length
Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Weight Lbs.
Part No.
Description
Stroke 4.000"
Main
Balance
EAG440940026135
Standard Weight
6.135" 2.200" 2.500" 2-Piece
Int.
2350
70-78
Chevrolet Big Block Eagle Cast Steel Crankshafts “ESP” features 092" radius on rod and main journals, rear seal and snout, compatibility with standard OEM-style bearings.
Min. Rod Length
Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Weight Lbs.
Part No.
Description Early Style Late Style Early Style Late Style
Stroke
Main
Balance
EAG104544000 EAG104564000 EAG104544250 EAG104564250
4.000" 4.000" 4.250" 4.250"
6.135" 2.200" 2.749" 2-Piece 6.285" 2.200" 2.749" 1-Piece 6.385" 2.200" 2.749" 2-Piece 6.385" 2.200" 2.749" 1-Piece
Ext. Ext. Ext. Ext.
2440 2420 2420 2420
65-67 65-67 65-67 65-67
195
2021-22 ENGINE BUILDER CATALOG
Made with FlippingBook flipbook maker