Engines & Components
Availability
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your...
Welcome to your headquarters for horsepower—the place to get everything you need to build real power and performance! We’ve got competition-proven crate engines, performance-matched top end kits, and complete rotating assemblies from the biggest names in the industry. You can add a set of high-flow cylinder heads to your powerplant, upgrade your valvetrain, improve your oiling system, or drop in a new set of pistons. We also have a complete selection of crankshafts, connecting rods, harmonic balancers, pulleys, and engine brackets. We even have everything you need to restore the horsepower that time has stolen from your daily driver.
Showing In Stock Items. Show All 15 Items.
Harmonic Balancer, Internal Balance, 6.130 in. Diameter, Nodular Iron, Black, Chevy, GMC, Oldsmobile, V6, Each
Part Number: PIO-DA-2621
Not Yet Reviewed
Estimated Ship Date: Jan 28, 2026 if ordered today
Estimated Ship Date: Jan 28, 2026 if ordered today
BUILD IT WITH SUMMIT!
Housing, Rear Main Seal, Aluminum, Chevy, LS, Each
Part Number: SUM-G2621
Estimated Ship Date: Today
Estimated Ship Date: Today
Valve Spring Locator, Outside Locating Shoulder, Chromoly, 0.070 in. Thick, 1.585 in. O.D., 0.640 in. I.D., 1.475 in. Spring O.D., Set of 16
Part Number: EW1-262-16
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -15cc Buick Dish Top Piston Set. 3.800 bore
Part Number: DMS-2-6213-3800
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -15cc Buick Dish Top Piston Set. 3.810 bore
Part Number: DMS-2-6213-3810
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -15cc Buick Dish Top Piston Set. 3.820 bore
Part Number: DMS-2-6213-3820
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -15cc Buick Dish Top Piston Set. 3.830 bore
Part Number: DMS-2-6213-3830
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -15cc Buick Dish Top Piston Set. 3.840 bore
Part Number: DMS-2-6213-3840
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -29cc Buick Dish Top Piston Set. 3.800 bore
Part Number: DMS-2-6215-3800
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -29cc Buick Dish Top Piston Set. 3.810 bore
Part Number: DMS-2-6215-3810
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -29cc Buick Dish Top Piston Set. 3.820 bore
Part Number: DMS-2-6215-3820
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -29cc Buick Dish Top Piston Set. 3.830 bore
Part Number: DMS-2-6215-3830
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Piston Set, 231 V6 & GN Buick V6 & Grand National 2-FX Series -29cc Buick Dish Top Piston Set. 3.840 bore
Part Number: DMS-2-6215-3840
Not Yet Reviewed
Estimated Ship Date: Jan 27, 2026 if ordered today
Estimated Ship Date: Jan 27, 2026 if ordered today
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Summit Racing™ LS Rear Main Seal Housings SUM-G2621
