LSX376 — Available Soon
GM Performance Parts takes the LSX Bowtie block and combines it with the LS3’s L92-style heads to create the LSX376 crate engine. This engine will be delivered without an intake manifold (and other accessories), but can be fitted with either a carburetor or production-style injection system to make it suitable for your street rod, ’57 Chevy or ’71 Camaro.
Specifications:
| Part Number: | 19171049 | Cylinder Heads (P/N 12615879): | Aluminum L92 style port; “as cast” | |
| Engine Type: | LSX Series Gen IV small-block V-8 | with 68cc chambers | ||
| Displacement (cu in): | 376 (6.2L) | Valve Size (in): | 2.16 intake / 1.59 exhaust | |
| Bore x Stroke (in): | 4.06 x 3.62 (103.25 x 92 mm) | Compression ratio: | 10.7:1 | |
| Block (P/N 19243171): | LSX cast-iron with 6-bolt | Rocker Arms (P/N 12569167 int): | Investment-cast, roll trunnion | |
| cross-bolted main caps | Rocker Arms (P/N 10214664 exh): | Investment-cast, roll trunnion | ||
| Crankshaft (P/N 12597569): | Nodular iron | Rocker Arm Ratio: | 1.7:1 | |
| Connecting Rods (P/N 12607475): | Powdered metal | Recommended Fuel: | 92 octane | |
| Pistons (P/N 12166957): | Forged aluminum | Maximum Recommended RPM: | 6600 | |
| Camshaft Type (P/N 12603844): | Hydraulic roller | Reluctor Wheel: | 58X | |
| Valve Lift (in): | 0.551" intake / 0.522" exhaust | Balanced: | Internal | |
| Camshaft Duration (@0.050 in): | 204° intake / 211° exhaust |
LSX454 — Available Soon
An engine with 454 cid will always recall legendary Chevys, and that tradition will continue with the all-new LSX454 crate engine. Based on the LSX Bowtie block, the new LSX454 will be delivered in Deluxe form, so you’ll get everything you need from the carburetor to the water pump, plus “LSX454” engraved valve cover logos.
Specifications:
| Part Number: | 19170112 | Cylinder Heads (P/N 19201806): | Aluminum LSX-LS7 port; | |
| Engine Type: | LSX Series Gen IV small-block V-8 | "as cast" with 70cc chambers | ||
| Displacement (cu in): | 454 (7.4L) | Valve Size (in): | 2.20 intake / 1.61 exhaust | |
| Bore x Stroke (in): | 4.185 x 4.125 (106.3 x 104.8 mm) | Compression ratio: | 11.0:1 | |
| Block (P/N 19243172): | LSX cast-iron with 6-bolt | Rocker Arms (P/N 12579615 int): | Investment-cast, roll trunnion | |
| cross-bolted main caps | Rocker Arms (P/N 12579617 exh): | Investment-cast, roll trunnion | ||
| Crankshaft (P/N 19170391): | 4340 forged steel | Rocker Arm Ratio: | 1.8:1 | |
| Connecting Rods (P/N 19166964): | 4340 forged steel | Recommended Fuel: | 92 octane | |
| Pistons (P/N 19166958): | Forged aluminum | Maximum Recommended RPM: | 6500 | |
| Camshaft Type (P/N 19166972): | Hydraulic roller | Reluctor Wheel: | 58X | |
| Valve Lift (in): | 0.635" intake / 0.635” exhaust | Balanced: | Internal | |
| Camshaft Duration (@0.050 in): | 236° intake / 246° exhaust |
