Chevrolet Performance LSX 454 Standard Deck Engine Block 4.185" Bore # 19260099

Chevrolet Performance 19260099 - LSX Finished and Honed 4.185 Bowtie Bare Block

The LSX Bowtie Engine Block showcases three major improvements

1. Added support on the deck surface.

2. Material Strength: 400 mPa tensile strength, compared to the 250 mPa previously offered. Material: Iron, G4000 with Molybdenum

3. Annulus cut within the cam bearing surface within the block for improved oil feed location. This allows for the oil feed hole to be located at three o'clock position versus the six o'clock position.

LSX Bowtie Block specs and features include:

CNC-machined cast iron block
True priority main oiling
6-head bolts per cylinder
Standard 4.400 bore spacing
Extra-thick siamese cylinder bores
Semi-finished, machined thicker decks
LS7-style, 6-bolt dowel-located billet main bearing caps
Wet-sump and dry-sump oiling capability
Production-style deep-skirt head bolt holes
Production bolt hole and thread sizes
Maintains production exterior accessory mounting provisions
Front motor plate mounting holes added
Additional material cast around cam bearings for greater strength
8mm exterior/interior fifth- and sixth-head bolt holes
Standard 0.842 lifter bores
Accommodates all LS oil pumps and oil pans
External oil pump feed (rear of block)
Main web bay-to-bay breathing holes to support greater horsepower
Includes unique cam retainer, rear cover and lifter retainers