The LS1 was the engine that launched the Gen III LS platform. Introduced in the 1997 Corvette, it replaced the LT1 and set the standard for the entire LS family that followed.
LS1 SPECIFICATIONS: Displacement: 5.7L (346 ci) Configuration: V8, OHV (pushrod), 2 valves per cylinder Block material: Aluminum Head material: Aluminum Bore: 3.898" Stroke: 3.622" Compression ratio: 10.1:1 (Corvette) / 10.2:1 (F-body — Camaro, Firebird) Horsepower: 305–350 hp (depending on application and year) Torque: 335–365 lb-ft
APPLICATIONS: 1997–2004: Chevrolet Corvette 1998–2002: Chevrolet Camaro (all versions) 1998–2002: Pontiac Firebird and Trans Am
KEY NOTES: • The LS1 uses an all-aluminum construction — both block and heads — making it significantly lighter than the iron-block small blocks it replaced. • Early 1997 Corvette LS1s have slightly different accessories and some casting differences from later production. • The Camaro/Firebird LS1 (F-body) produced slightly different power than the Corvette variant due to different intake and exhaust tuning. • The LS1 shares the same bore and stroke as the LS6, which is the high-performance version. The LS6 has revised heads, intake manifold, and higher compression.
For help confirming fitment for your application, contact us at 1-844-XPARTS-1 or support@expediaparts.com.
