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You are here: Home > Car/Truck Motors & Accessories > Gas/Nitro Engines > HPI Engines & Parts
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HPI Pull-Start Assembly: Nitro Star 21BB, 25, & F4.1
Our Price: $16.99

This is the HPI pull-start assembly for the HPI F4.1 (which is the 4.1 engine on the Savage X), the Nitro Star BB Series 21 & 25, Force 21 & 25, and G3.0 engines from HPI, as well as the Force 21 & 25 from Ofna. This fits the Savage X 4.1 as well as the Savage .21 and .25 truck engines.
HPI One-Way Bearing: Nitro Star 21BB, 25, & F4.1
Our Price: $12.99

This is the HPI One-Way Bearing for the HPI F4.1 (which is the 4.1 engine on the Savage X), the Nitro Star BB Series & Force 21 & 25, and G3.0 engines from HPI, as well as the Force 21 & 25 from Ofna. This fits the Savage X 4.1 as well as the.21 and .25 Savage engines. This one-way bearing allows the recoil starter to grab the crankshaft to start the engine and spin freely once running.
HPI Savage 25 Cylinder, Piston, & Connecting Rod Set
Our Price: $59.99

This is the HPI Nitro Star .25 Cylinder, Piston, and Connecting Rod Set. This fits the Savage 25. This is a matched set that is installed inside the engine. This is a great way to restore the power to your HPI engine.
HPI Nitro Star T-15 Engine w/Pull-Start
Our Price: $69.99

This is the HPI Racing Nitro Star .15 cu in (2.49cc) T-15 Pull Start Engine. This engine produces 1.2 HP at 29,000 RPM!
HPI Nitro Star K4.6 w/Pull-Start
Our Price: $179.99

This is HPI's Nitro Star K4.6 .28 size Engine with the pull-start. This is a direct bolt in to any Savage monster truck, including all Savage X trucks. This would be a great upgrade for any monster truck that uses a standard big-block engine.
HPI Pull-Start Assembly w/o One-Way Bearing: K4.6 & 4.6 HO
Our Price: $16.99

This is the HPI Recoil Starter Assembly for the HPI Nitro Star K4.6 and 4.6HO engines on the Savage and Hellfire trucks. This also fits the HPI K5.9 engine on the Savage XL 5.9 trucks.
HPI Roto-Start Back Plate: Savage X (F4.1), 21, 25
Our Price: $12.99

This is the Back Plate Unit for the HPI F4.1 (which is the 4.1 engine on the Savage X), the Nitro Star BB Series & Force 21 & 25 engines from HPI, the HPI G3.0, as well as the Force 21 & 25 from Ofna. This fits the Savage X 4.1 as well as the.21 and .25 Savage engines.
HPI Roto-Start Back Plate Gear Set: Savage X (F4.1), 21, 25
Our Price: $9.99

This is a Roto-Start Backplate Gear Set for the HPI Savage X, .21, and .25 Roto Start systems. These gears mount on the back of the engine being used.
HPI Roto-Start K4.6 Backplate: Savage X 4.6, Hellfire
Our Price: $15.99

This is the HPI Roto-Start K-Series Engine Backplate for use with HPI's K4.6 and K5.9 engines found in the Savage SS .28, Savage 4.6, Savage X 4.6, Savage XL K5.9, and Hellfire trucks. This is the Roto-Start backplate only. If you need the complete system, please seach for part number HPI87126.
HPI K4.6 HO Cylinder & Piston Set
Our Price: $44.99

This is the Cylinder/Piston Set for the HPI K4.6 HO engine, HPIG5204.