This is the ATG v3 throttle governor developed and flown by Multi-time World Champion Curtis Youngblood. This Dual Mode Governor features a simple push button setup, RPM indication lights in a small slim case. Compatible with the G-view display. The ATG has two modes for TPM control. The first, Normal mode, allows you to just set the RPM and fly. The second, Active Throttle Mode, lets you use full throttle curves and mixes while still governing the engine giving you the most performance out of your system.

This is the O.S. Max .32SX-H Ringed Helicopter Engine. It features ABC construction, Aluminum piston with a Brass cylinder liner that is Chrome plated as well as a larger bore #20C carburetor and two year limited warranty. Package includes O.S. Max .32 SX-H Helicopter Engine with 20C carburetor, extra throttle lever, #8 glow plug and instruction manual.

It's the largest engine displacement allowed in FAI F3C and AMA - sanctioned heli competitions! Newest version of the .91 SX-H features advancements that can make the difference between winning and losing. Foremost among its upgrades is a three-needle carb for the ultimate in fine-tuning. A lighter piston and conrod combined with a more balanced crankshaft significantly reduce high-rpm vibration. The round gold Hyper head with horizontal fins offers better cooling and sharper looks. Still retains the .91 SX-H's push/pull throttle arm dual ball bearings and ringed construction. The carburetor on the .91 SX-H Ringed Special Heli Engine features three needles: one for high-end one for low-end and a third for all-important mid-range hovering.

This is the O.S. Max .91 SZ-H PH Hyper Helicopter Engine with Pump. O.S. has enhanced the World Championship-winning performance of the .91 SZ-H Ringed heli engine by equipping the PH-Hyper version with a pump, which delivers consistent fuel pressure, regardless of the helis attitude. Pilots will still enjoy all of the .91 SZ-H original features, including new intake porting, a new carb and a redesigned crankcase that offers better support for the clutch and rotor. FEATURES: Redesigned crankcase provides better support for the crankshaft and thrust bearings. New 60M 3-needle carburetor with mid-range needle for precise adjustments and push/pull throttle arm for added precision in power control. Front and rear ball bearing-supported crankshaft. Blue anodized cylinder head with O.S. and World Champion's Spec printed in white at the top of the head. Graphite backplate pump mount. Two year limited warranty. INCLUDES: O.S. Max .91 SZ-H PH Hyper Helicopter Engine with Pump with #8 glow plug, one .004 inch (.11mm) head gasket and one .008 inch (.22mm) head gasket, decals, Woodruff key, needle adjust screw (2.6X5mm) and instruction manual.