CP-Carrillo BLS1135-030-1 Bullet Series Forged Flat-Top Piston GM LS 4.030 Bore Single

The CP-Carrillo BLS1135-030-1 is a single forged piston from the Bullet Series, designed for GM LS engines with 15° cylinder heads. This is a single-piston unit (suffix -1) from the BLS1135-030 family, ideal for replacement or custom builds requiring individual pistons.

Key Specifications:

• Bore: 4.030 in.
• Stroke: 3.622 in.
• Rod Length: 6.125 in.
• Compression Height (CH): 1.300 in.
• Dome/Dish: Flat Top, -2.7cc
• Piston Weight: 479 grams
• Compression Ratio: 10.20:1
• Wrist Pin: .927 x 2.250 in. (Chromoly, included)
• Ring Grooves: 1.5mm / 1.5mm / 3.0mm
• Skirt Clearance: -.175 in. / SP

Key Features:

• Forged from 2618 aluminum alloy for exceptional strength and durability under high-stress conditions
• Designed specifically for GM LS engines with 15° cylinder heads (4.8L, 5.3L, 5.7L, 6.0L, 6.2L)
• Power adder compatible — rated for use with nitrous oxide, superchargers, and turbochargers
• Dual forced pin oilers for reliable lubrication
• Contact reduction grooves and accumulator groove for improved ring seal
• Forged side relief for reduced skirt friction
• Contemporary high-performance 1.5/1.5/3.0mm ring set included
• Proudly made in the USA

CP-Carrillo's Bullet Series delivers race-proven forged piston technology at an accessible price point, incorporating the same computer-designed forgings, tight tolerances, and rigorous quality control standards found across the full CP-Carrillo product line. The BLS1135-030-1 is an excellent choice for performance street and forced-induction LS builds targeting a 4.030" bore.