Big power for late-model vehicles
Using the LS3 engine as its foundation, the LS376/515 crate engine adds a racing-derived ASA Hot Cam and a carbureted intake system.
PART NO. 19434640
533 HP @6600 RPM
477 LB/FT @5200 RPM
For street or strip
The assembly includes an SS oil pan and LS3 cylinder heads, with high-flow, rectangular-port intake passages, as well as our unique, spider-type carburetor intake manifold.
Installation Guides
Find everything from vital data about your engine’s capabilities to how to install it into your build.
Connect & Cruise Powertrain System
Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles.
†Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC. Parts only when consumer repaired or installed in non-highway application. Coverage limited to defects in material and/or workmanship of the specific part only. Warranty valid when all required components are installed on the same vehicle and purchased on one invoice.
††Must be purchased from a participating U.S. dealer or Chevrolet Performance Authorized Reseller. Mail-in rebate offer not available with other offers. See gmpartsrebates.com for details, applicable rebate amounts, and rebate form. Rebates must be submitted by 1/31/25. Rebates may be submitted over two invoices within 120 days of each other. Allow 6 to 8 weeks for delivery of debit card. Offer valid 1/1/24 to 12/31/24.
Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance parts that are emissions-related may not meet U.S., Canadian, and state and provincial laws and regulations relating to motor-vehicle emissions. These parts are designed and intended for use in vehicles operated exclusively for competition: in racing or organized competition on courses separate from public streets or highways. Visit www.chevroletperformance.com/emissions for more details. Rebate form and details available at chevrolet.com/performance/offers.
LS376-515 Tech Specs
- Part Number: 19434640
- Engine Type: LS-Series Gen-IV Small-Block V-8
- Displacement (cu. in.): 376 (6.2L)
- Bore x Stroke (in.): 4.065 x 3.622 (103.25 x 92 mm)
- Block (P/N 12623967): Cast-aluminum with six-bolt, cross-bolted main caps
- Crankshaft (P/N 12597569): Nodular iron
- Connecting Rods (P/N 12607475): Powdered metal
- Pistons (P/N 19207287): Hypereutectic aluminum
- Camshaft Type (P/N 88958770): Hydraulic roller
- Valve Lift (in.): .525 intake / .525 exhaust
- Camshaft Duration (@.050 in.): 226° intake / 236° exhaust
- Cylinder Heads (P/N 12629063): Aluminum L92-style port; “as cast” with 68-cc chambers
- Valve Size (in.): 2.165 intake / 1.590 exhaust
- Compression Ratio: 10.7:1
- Rocker Arms (P/N 12569167 int): Investment-cast, roller trunnion
- Rocker Arms (P/N 10214664 exh): Investment-cast, roller trunnion
- Rocker Arm Ratio: 1.7:1
- Recommended Fuel: Premium pump
- Maximum Recommended rpm: 6600
- Reluctor Wheel: 58X
- Balanced: Internal
Mobil 1 is now The Official Motor Oil of Chevrolet Performance.