ENGINE BLOCK SLEEVES
Rough Bore
Outside Diameter
Wall Thickness
Flange Thickness
Flange Diameter
Part No.
Application
Length
Darton Sleeves DAR300-022 DAR300-023-DF
LS7 Single Cylinder Replacement LS2/LS3/LS7 3.897" Undersized Bore LS2/LS3/LS7 3.897" Undersized Bore LS1/LS6 Replacement 3.897" Bore LS7 Replacement Sleeve Dual Flat LS7 Replacement Sleeve Single Flat
4.110" 4.310" 5.800" 3.875" 4.325" 5.800" 3.875" 4.325" 5.800" 3.890" 4.180" 5.600" 4.110" 4.325" 5.800" 4.110" 4.325" 5.800"
0.100" 0.225" 0.225" 0.145" 0.108" 0.108"
.210" .215" .215" .285" .215" .215"
4.565" 4.575" 4.575" 4.320" 4.575" 4.575"
DAR300-023-SF
DAR300-024
DAR300-027-DF DAR300-027-SF
MAIN BEARING CAPS
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 PGESBLS1 Stock Block LS, 4.0L, 5.3L, LS1, LS2, LS6 (5 Cap Set) Stock Stock Stock Step
CRANKSHAFTS
LS-Based Forged Steel Crankshafts Callies
Compstar LSx features Spec 4340 material, mid-weight design, multi heat-treated, double stress-relieved, nitride-hard- ened, properly placed counterweights profiled for piston clearance, drilled rod journals, precision ground and mirco-pol- ished to 5Ra. Dragonslayer LSx features Spec 4340 material, mid-weight design, multi heat-treated, double stress-relieved, nitride-hardened, properly prepped counterweights, gun-drilled mains, lightened rod journals, dual linear post keyways, pre- cision ground and micro-polished to 5Ra.
Min. Rod Length
Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke
Main
Balance
LS1 Compstar, 24-Tooth Reluctor LS1 DragonSlayer, 24-Tooth Reluctor
CALAPO317-CS24
4.000"
6.100" 2.100" 2.559" 1-Piece
Int.
1785
55
CALAPO31T-DS
4.000"
6.100" 2.100" 2.559" 1-Piece
Int.
1785
48
Dart Features 4340 billet steel, 8 counterweights added front, center, and rear, heavy-duty rod cheeks, small hole through the rod pin, dual keyway provision, large radii for narrowed rod bearings, chamfered oil holes, highly polished journals, no Mallory required. 800-900 HP naturally aspirated, and works in power-adder engines. Recommended for use with LS Next/ SHP LS Blocks. Fully polished option special order only.
Min. Rod Length
Rod Pin
Rear Main Seal
Target Bobweight Grams
Approx. Wt. /Lbs.
Part No.
Description
Stroke
Main
Balance
LS1/LS6 Short Snout, 24-Tooth Reluctor
DRT9-34640006125-8 †
4.000"
6.125" 2.100" 2.559" 1-Piece
Int.
1780
60
† These Dart cranks are precision fitment in Dart LS Next and SHP LS blocks.
151 2021-22 ENGINE BUILDER CATALOG
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