GM LS / LT Long Block — Built to Order, up to 1,500 HP
4 interest-free payments or as low as $—/mo with Affirm. See if you qualify
Ships directly from the supplier — in stock at the manufacturer
We confirm your ship date within one business day of ordering, and you can cancel for a full refund if the date does not work.
Compatibility
- Vehicle-specific fitment
- Review application details below
- Need help?
- Confirm fitment with us before ordering — (714) 202-7886
We list the engine platform a part is built for. That is not year-and-trim application data, so it does not confirm a fit on your specific vehicle.
- Install quoted on request. We fit parts in-house in Huntington Beach, but we do not publish a labor figure for this item — we would rather quote your car than guess. Call (714) 202-7886 or pick Install at HRC and add your vehicle details, and we will come back with the labor.
- Warranty & track disclaimer — read before you race it.
- Shipping & returns — rates and RMA terms.
- Installed in-house in Huntington Beach, CA — labor & service policy.
- Affirm and PayPal available at checkout.
More ways to pay at checkout
A long block specified to your power target and assembled on our own bench in Huntington Beach. Machine work is carried out by our partner machine shop here in California; block prep is done to the design spec for your combination.
Power ceiling: built to support targets up to 1,500 HP. The exact combination — crank, rods, pistons, block prep — is specified to the number you are chasing, and we confirm scope and lead time with you before any work starts. Final tuning is arranged through our tuning partner.
What is in it
| Crankshaft | Eagle Eagle Chevrolet LS1 24T 3.622in Stroke 24 Tooth Reluctor Forged 4340 Steel Cra | 434636226100 |
|---|---|---|
| Connecting rods | BoostLine BoostLine Chevy LS / Gen V LT1 6.125in - Connecting Rod Kit | LS6125-927 |
| Pistons | Wiseco Wiseco Chevrolet LT1 6.2L 4.070 Bore 1.304 Comp Ht. -12cc Volume Left Side Pis | 60232LX05 |
| Piston rings | Manley Performance Manley Ring Set Chevy LT1 4.070in / 1.2mm Thick / 3.0mm - Set of 8 | 46017ST-8 |
| Rod bearings | King Engine Bearings King Engine Bearings GM 6.2 - LT1/LT4 Gen V Connecting Rod Bearing Set | CR8057MC |
| Main bearings | King Engine Bearings King GM 294/325/345/364CI 4.8/5.3/5.7/6.0L L20/LS1/LS2/LS4/LS6 Main Bearing Se | MB5293SI |
| Head gasket | Cometic Gasket Cometic GM LS1 SB 4.100in Bore .045in MLS-5 Head Gasket | C5489-045 |
| Head studs | ARP ARP SB Chevy LT1 6.2L Head Stud Kit | 234-4342 |
| Camshaft | COMP Cams KIT, CAMSHAFT INSTALL- FOR GM LT4 CORVETTE (5627CPG) | 5627CPG |
| Timing set | COMP Cams HIGH ENERGY TIMING CHAIN, LT1 '95-UP (3307CPG) | 3307CPG |
| Valve covers | ARP ARP Valve Cover Bolt Kit 12-Point Head Chevy Gen III/LS Series Small Block | 100-7523 |
Every part above is a SKU we stock and can be viewed on this site. Component brands may be substituted to suit your power target and current availability — the spec sheet you receive before assembly is the one that is built.
Notes on this platform
- Crankshaft chosen per build. The factory LS crank is a genuinely good part and stays in most builds; an aftermarket forged crank goes in when the power target calls for it rather than as a default upsell.
- Cerakote finish available throughout, not only on the parts visible with the hood up.
How the price is made up
- Components at our listed retail: $4,013.52
- Blueprint assembly, 18 hours at our published $125.00/hr shop rate: $2,250.00
- Machine work is quoted separately once the block is measured — it depends on what the block needs, and we will not guess at it.
No dyno figure is quoted. We do not run a dyno and we do not tune; tuning goes to our tuning partner. Any power number attached to a build is the target it was specified to hit, not a measured result.
| Part No. | HRC-LS-LONGBLOCK |
|---|
Platform-level fitment (Ford + GM, Phase 1). We publish the engine platform a part is built for — not year-and-trim application data — so nothing here confirms a fit on a specific vehicle. Confirm fitment with us before ordering: (714) 202-7886.
Commonly Needed With This
Parts builders usually buy alongside this one — gaskets, seals and hardware for the install. These are suggestions, not a verified fit: call (714) 202-7886 to confirm before ordering.
