Page 152 - 2021-22_EngineCatalogAP

ENGINE BLOCKS
Chevrolet Performance LSX Bowtie Block
Chevrolet Performance LSX Bowtie Block is an iron block casting based primarily on GM's pro-
duction LS7 block with more material in key areas. It offers a thicker deck and bores to support
displacements up to 454 CID and a unique six-bolt-per-cylinder head-clamping capability for
forced induction and nitrous greater than 2,000 HP. The LSX Bowtie block accepts all LS Series
Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories. Block Specs: 3.88" finished Siamese cylinder bores (maximum 4.200" bore at 0.200" min. wall thickness), 9.260" semi-finished deck height (can be machined to 9.200"), 4.250" maximum stroke, 0.842" standard lifter bores, 6 head bolts per cylinder, true priority main oiling, 4.400" bore spac- ing, extra-thick Siamese cylinder bores, LS7-style, 6-bolt dowel-located billet main bearing caps, wet and dry sump oiling capacity, front motor plate mounting holes added, unique cam retainer, rear cover and lifter retainers, main web bay-to-bay breathing holes, and finished in a orange powder coat.
Part No. Description Bore Deck Height Main Cap
GMP19417351 GM LSX Bowtie Block 3.880"
LS Series Aluminum and Iron Small Blocks
9.260" 6-Bolt
LS / LT (GEN-5) SERIES
LS Series blocks successfully merge pushrod technology with the modern LS family of cylinder heads. LS aluminum blocks are beefy enough for 550 horsepower and the LSX cast iron block is strengthened in every way possible and can handle over 1500 horsepower.
Part No. Description
Aluminum Engine Blocks
Bore Height
4.000" 9.240" 4.065" 9.240"
4.065" 9.240"
4.065" 9.240" 4.185" 9.240" 3.880" 9.720" 4.000" 9.720"
Caps
6 Bolt 6 Bolt
6-Bolt
6 Bolt 6 Bolt 6 Bolt 6 Bolt
GMP12679002 GMP12673475
GMP12673475
Iron Engine Block
GMP19417352 GMP19417353 GMP19417354 GMP19369841
Bare 6.0, LQ4, LQ9 Block
LS3/LS92 Aluminum Block, Nodular Iron Main Caps LS3/LS92, 6.2L Aluminum Block,
Max Bore 4.085", Powdered Metal Main Caps
LSX Iron Block LSX Iron Block LSX Iron Block GEN IV 6.0, Iron Block
Dart LS Next Cast Iron or Aluminum Engine Blocks
Fully redesigned blocks combine the benefits of improved lubrication, increased durability and added versatility. Offered in aluminum or cast iron, blocks use conventional 4-bolt main caps and oil pans, while eliminating the problems associated with the separated crankcase bays. Redesign provides significantly stronger main webs, while allowing the cylinder barrels to be extended .375" into the crankcase for added piston support. Blocks are fully compatible with all stock and aftermar- ket LS components, and the stock oil pan may be used with Moroso oil pan spacers.
Part No.
DRT31837111 DRT31837211 DRT31937211 DRT32000016 DRT32000118F
Description
Iron Block with Billet Main Caps
Iron Block with Billet Main Caps Aluminum Block with Billet Main Caps
Bore
4.000" 4.125" 4.125"
Deck Height
9.240" 9.240" 9.240"
Main Cap
4 Bolt 4 Bolt 4 Bolt
Cam Journal
55mm 55mm 55mm
Hardware Kit for LS Next Blocks (w/ brass freeze plugs, coated cam bearings, and dowel pins) Windage Tray Hardware Kit
Dart SHP LS Next Cast Iron Blocks
Same Dart design as the LS Next Iron & Aluminum Blocks. The SHP design retains the OE-style factory block skirt. Uses OE oil pan as well as front and rear covers.
Part No.
DRT31867111 DRT31867211 DRT32000018 DRT32000118F
Description
Bore
Deck Height
9.240" 9.240"
Main Caps
4-Bolt 4-Bolt
RHS LS Race Block
SHP LS Next Iron Block 4.000"
SHP LS Next Iron Block 4.125"
Hardware Kit for SHP LS Next Blocks (w/ brass freeze plugs, coated cam bearings, and dowel pins)
Windage Tray Hardware Kit
The LS Race Block adds the benefits of an extra-thick .750" deck surface, raised cam center line and priority main bearing oiling. Cylinder walls are Siamese cast with press-in cast iron liners. Patented Clean Cast Technology provides a superior finish.
Part No. Description Bore Deck Height Main Cap Cam Journal
RHS54903U † LS Aluminum Race Block 4.120" 9.250" 6 Bolt 60mm
† With .388" raised camshaft location
150 2021-22 ENGINE BUILDER CATALOG
Deck Main