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427" LS7 Short Block
$7,950.00
Kick your LS7 build into high gear with this 427" Short Block, crafted for everything from street/strip cruisers to drag strip beasts! Available in two setups—1300hp for versatile performance or 1700hp for max power—this short block is your foundation for LS7 engines with a 4.125" bore. Whether you’re boosting a daily driver or chasing low ETs, it’s built to deliver, with pre-installed camshaft and sealed-up kits for easy integration. Call 210-446-0960 to pick the perfect heads and tune for your goals!
Explore the components in each configuration for your LS7 project:
| Component | 1300hp Setup (est. 800-1000 ft-lbs torque) | 1700hp Setup (est. 1000-1200 ft-lbs torque) |
|---|---|---|
| Block | Dart SHP Iron, 7/16" Head Threads, 7/16" Main Bolts, 4.125" Bore | Dart SHP PRO Iron, 1/2" Head Threads, 7/16" ARP Main Studs, 4.125" Bore |
| Crankshaft | 4340 8-Cwt LS7, Internal Balance, 4.000" Stroke, 58x | 4340 8-Cwt LS7, Internal Balance, 4.000" Stroke, 58x |
| Connecting Rods | 4340 Forged Steel H-Beam, ARP2000 Bolts, 6.125" Length | 300m Billet Steel I-Beam, ARP2000 Bolts, 6.125" Length |
| Pistons | Wiseco 2618 Forged Aluminum, Coated Skirts, 0.200" Pins | JE Ultra 2618 Forged Aluminum, Coated Skirts, Gold Thermal Barrier, 0.200" Pins |
| Rings | Stainless Steel Top, Napier 2nd, Low Tension Oil | Stainless Steel Top, Napier 2nd, Std Tension Oil |
Included Kits:
- Camshaft Kit: Forged Camshaft, Gaterman Link-Bar Hydraulic Roller Lifters, 4x Timing Set (pre-installed)
- Sealed-Up Kit: Katech Blue Oil Pump, GM Rear Main Seal Cover, LS7 Front Timing Cover, LS Valley Cover (pre-installed)
Build Tip: The 1300hp setup is great for LS7 street/strip cars hitting 800-1300hp with a supercharger, while the 1700hp version suits drag builds pushing 1400-1700hp with turbos. Reuse your LS7 oil pan and match with high-flow heads for peak performance!
Installation Notes: Clearances are pre-set for each config (1300hp or 1700hp), but a skilled builder should verify fitment for your setup (NA, turbo, or supercharged). Reuse your LS7 oil pan. We’re not liable for damage from improper installation or user-added components.
Sales Policy: Short blocks are custom-built and non-returnable. All sales are final, so confirm your LS7 build specs before ordering!