LS Engine Parts and Accessories

Holley LS Hi-Ram EFI Manifold

• Runner Length – 6.29”, As-Cast Runner Cross-Sectional Area – Tapered 4.67in² to 2.84 in²
• Throttle Body Flange Location, with 92/102mm EFI Plenum Top : Height – 8.42” (from engine block lifter valley cover flange), Longitudinal Location – 3.84” (forward from engine block front flange), Angle – 25 deg. (down from vertical)
• Plenum Top Gasket Type – 3/32” Round O-ring Cord
• Mounting Flange Gasket Type – Standard LS3 Molded O-Ring
• Port Size – 2.49” Height x 1.21” Wide
• Total Height with 92/102mm EFI Plenum Top – 12.32” to the lifter valley cover flange on engine block.
• Base Plenum Top Mounting Flange Height – 8.42” to the lifter valley cover flange on engine block.

These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration. Top can be mounted forward or backward. Holley EFI LS main harnesses have a map sensor connecter designed for use with an LS1/2 style map sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.

GM LS1 - LS3 Thermostatic Cooling System for Freshwater Sterndrive Applications

As Hardin Marine continues the quest towards new product development they have designed an easy to install thermostatic cooling system for freshwater raw water cooled engine applications. This system allows use of an OEM circulating style water pump and multiple accessory drive kits to to be used while providing the necessary thermostat assembly for temperature control. This is perfect for retrofitting a GM LS based engine into most popular sterndrive engine applications using a sea water pump assembly. Precision CNC machined and anodized satin finish make for an attractive compact fitment. Each unit features a 160 degree thermostat while other heat range thermostats and a bypass hose assembly is sold separately.

Bypass Hose Kit GM LS1 - LS3 Thermostatic Cooling System 

For use with 625-4530 Thermostatic Cooling System.

GM LS Series, Rear Sump Swap Oil Pan

Wet Sump, 5 Quart Capacity, 5'5" Deep, 8.5" Wide, 8.375" Long
Engine Application: GM LS Series
Fits: LS Engine Conversions that require a Rear Sump
1/2"-20 drain plug

• Oil pan has a thick precision laser cut steel rail with a durable fabricated steel sump plated with a clear zinc finish
• Fabricated, durable steel construction is more adaptable to add fittings, change finishes and weighs les than cast aluminum construction.
• Clears 4.25" stroke with most steel rods
• Front of the oil pan is 1.813" Deep to the beginning of the 5.5" deep sump.
• The fabricated steel sump is 5.5" Deep, 8.5" Wide, and 8.375" Long
• Removable anti-slosh baffle
• Features a billet aluminum adapter that allows a 13/16" thread Moroso or OEM oil filter to be mounted in the stock location, no need to run a remote oil filter.
• Designed to be used with Moroso 740-24050 Oil Pump Pickup
• Magnetic drain plug and uses a stock dipstick

GM LS Series Remote Oil Filter Adapter

• Replaces Moroso Spin-On oil filter adapter on Moroso #'s 20142, 20143 & 20151 oil pans, comes standard on Moroso # 20146 oil pan.
• Ideal when chasis restrictions don't allow the use of block mounted filter or when a larger external filter is desires.
• Billet aluminum construction
• -10 AN "In" and "Out" ports
• Includes mounting hardware and engine block sealing O-Rings

GM LS Series Remote Oil Filter Adapter - 90 Degree

This billet aluminum adapter is designed to install under the pan rail of  LS1 pans and provide inlet and outlet ports for installing lines to a remote oil filter. Adapter features o-ring seals between the pan and the adapter and 1-1/16" -12 AN oil inlet and outlet ports.

• 1/2 NPT Inlet and Outlet 
• Ports are set at 90 Degrees
• Lightweight Billet Design

Hardin Billet Aluminum Flywheel Internal Balance for GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material:Aluminum

These precision billet aluminum flywheels deliver all of the strength and reliability that you desire with the light weight and advantages that only aluminum can provide. Lightweight Aluminum alloy flywheels can offer substantial benefits for certain situations such as light weight boats or racing boats that need rapid engine rpms instantaneously. These are recommended as replacements for factory-cast flywheels in high performance and racing applications. They're better for acceleration of heavier race boats. All Hardin flywheels are CNC-machined from certified materials.

• Accepts Mercury HP couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Light weight yet durable
• Zero/neutral balance • 168 tooth gear
• Bottom Mount Starter Flywheel
• Weight: 12 lbs

Hardin Steel Flywheel Internal Balance GM (LS1-LS7)

Ring Gear Tooth Quantity:168-tooth, Rear Main Seal Style:1-piece, Flywheel Material: Steel

These precision steel flywheels deliver all of the strength and reliability that you need in a performance application) Cast flywheels are porous units designed for low rpm truck and industrial applications) Steel provides a shatter free strength that could mean the difference between ripping your boat in half under way. These neutrally balanced units drilled to accept popular Mercruiser high Performance couplers.

• Accepts Mercury couplers and heavy duty drive plates
• Multi-point ring gear attachment
• Zero/neutral balance • 168 tooth gear
• Bottom Mount Starter Flywheel
• Weight: 32 Lbs

Power Take Off Adapter - LS Chevy 1310 Flexplate

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flexplate and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1310 Flywheel

Uses 3/8-24 bolts on 2" x 2-3/8" centers

These flanges bolt on the flywheel and accept 1310 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1350 Flexplate

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

Power Take Off Adapter - LS Chevy 1350 Flywheel

Uses 7/16-20 bolts on 2-3/8" x 2-7/8" centers

These flanges bolt on the flywheel or flexplate and accept 1350 spicer drivelines.  There are many more available, just call us. These power take offs are needed when attaching your drive shaft to your engine.

Need help choosing your new PTO flange? Check out this handy tutorial!

LS PTO 1310 Adapter Bolt Kit

This is a special metric bolt kit for 1310 LS PTO's.

Contains (6) M11x1.5x31 Bolts and (4) 3/8"-24 x 1" bolts

LS PTO 1350 Adapter Bolt kit

Contains (6) M11x1.5x31 Bolts and (4) 7/16"x1" bolts

Head Studs w/12-Point Nuts, SB Chevy LS1, LS6 5.7L/6.0L, 2004 Engines

Exact Tolerances for Perfect Alignment
Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. Head Studs include hex nuts and are manufactured by from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.

Head Studs w/12-Point Nuts, SB ChevyLS1, LS6 5.7L/6.0L

Exact Tolerances for Perfect Alignment
Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. Head Studs include hex nuts and are manufactured by from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2003 & Earlier) Hex Head

HIGH PERFORMANCE SERIES
High Performance head bolts are available with a reduced wrenching hex and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head re-torquing. All High Performance Series bolts are 170,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.

Hi-Performance Head Bolt Kit, SBC Gen III/LS Series (2004 & Earlier) w/All Same Length Bolts

HIGH PERFORMANCE SERIES
High Performance head bolts are available with a reduced wrenching hex and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head re-torquing. All High Performance Series bolts are 170,000 psi (which is 15% stronger than Grade 8) and kits come complete with hardened parallel-ground washers.

SB Chevy LS1 pro-series hex head stud kit

Head Studs with Hex Nuts, SB Chevy LS1, LS6 5.7L/6.0L

Exact tolerances ensure that gaskets and cylinder heads just glide into position and align perfectly. ARP Head Studs include hex nuts and are manufactured by ARP from premium 8740 chrome moly steel and heat treated to 190,000 psi. They are thread rolled after the heat treating process, which vastly improves their fatigue tolerance compared to studs threaded before heat treatment. High-quality, parallel ground washers included.

LS1, LS6 5.7L & 6.0L balancer bolt kit

• M16 x 2.0 Thread
• 4.325" UHL
• 1-1/16" Socket

To ensure the damper is locked into place, use these ultra-strong 200,000 psi bolts that exert maximum clamping force. Special features include 1/4" thick washers with an extra wide surface and tall 12-point heads that accept a deep socket to end the worry of stripping the head.