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The ideal GM TH400 upgrade for any power level, Sonnax heavy-duty forward drums (34554-01) feature a unique combination of high-strength, light weight, and a cutting-edge design to optimize transmission performance. Racing applications quickly push the heavy, cast-iron OE drum over its limits, with failure most common at the weak point where the shaft and drum connect. The problem can be addressed with a larger spline and lighter-weight aftermarket aluminum drum—but durability becomes a huge issue with wear of the clutch splines, shaft spline connection, and seal ring bore. To dramatically reduce weight and deliver the ultimate in reliability, the Sonnax high-strength, chromoly steel drum is custom-engineered with several lightening features for a low rotating mass. It weighs 3 lbs. less than the OE drum and is just 3 oz. heavier than a common aluminum drum. Weight is reduced carefully, without compromising strength, by ribbing the front of the drum, adding clutch splines (28 vs. 14) and lightening holes, plus reducing the diameter inner section of the drum at the middle seal ring area. This versatile drum upgrade has an oversized 28-tooth shaft-to-drum spline and can be used with a variety of input shaft styles. This includes Sonnax 1 in. diameter, 30-spline heavy-duty input shaft 30280-02, Sonnax 1 1/8 in. diameter, 35-spline big input shaft 35280-02, and other aftermarket shafts with 28-spline connection between shaft and drum: * Ultra-modern drum delivers both high-strength and light weight for unrivaled performance at any power level * Compatible with Sonnax and other aftermarket 28-spline input shafts * Optimized for use with rubber clutch separators for applications with clean neutral setups * Clutch spline major diameter is reduced slightly, and two sets of full-length clutch splines added to back up clutch separators * Lightening holes correspond to input speed sensor locations in aftermarket cases for more accurate converter and shift data * Middle seal is eliminated—an aluminum clutch volume spacer kit 34554-11K is available separately for applications in which clutch fill/drain time may be a concern * Sonnax high-RPM checkball capsule 57510-01 is installed to eliminate pressure drop at high (5500+) RPM, a common problem with OE and other aftermarket checkballs
Not Yet Reviewed
$358.80
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Sonnax knows you want your transmission to shift like a dream. Their automatic transmission bands are extra-wide intermediate bands suitable for heavy-duty, commercial, and 4x4 vehicles. These drop-in replacements provide 15 percent more holding capacity and feature a 60 percent thicker case anchor, decreasing the chance of band failure under severe conditions. (Note: The red-lined version of these Alto bands is designed for high-torque street racing applications. The Kevlar®-lined version is too aggressive for street use and best suited for high performance racing applications.)
( 8 )
$267.47
Summit Bucks
Street Series RS-3 mufflers are race-bred ovals with the unmistakable look and sound of Yoshimura. Besides the racing style, these mufflers have what you need—loads of performance! RS-3s have single turn-down tipped end caps of polished stainless steel or aluminum. They feature a straight baffle for ample flow, and material options of carbon fiber or polished stainless. Dozens of street-legal models are available. Order the RS-3 recommended to fit your bike application.
Not Yet Reviewed
$459.00
Summit Bucks
TCI Maximizer rebuild kits are ideally suited for off-road, towing, and other severe-duty applications. Each kit contains gaskets, seals, new premium-quality frictions, steels, a high-volume filter, and a drain plug. Also included are valve body recalibration modifications, which provide crisper shifts without the harsh feel found in kits designed for racing. Durability is improved because less heat is generated per shift than is associated with the OEM shift characteristics. TCI Maximizer rebuild kits also increase the torque capacity of the transmission to make towing or off-roading a breeze.
( 18 )
$341.95
Summit Bucks
Enduro Series TRS exhaust systems are dazzling proof that you can get Yoshimura quality and performance at a very friendly price. They feature TRS race-bred mufflers with the clear look and sound, for which Yoshimura is famous. The straight baffle leads to a single polished stainless steel tip. These systems are equipped with USFS-approved spark arrestors, forest-friendly noise levels, and are tailpipe emissions compliant. Enduros are available for a variety of Honda® applications. Additional features: * Tri-oval shaped sleeve * Large volume of packing material * Straight baffle for ample flow * Machined aluminum end-cap with welded tip * Stainless steel header and tailpipe
Not Yet Reviewed
$489.00
Summit Bucks
Yoshimura TRS mufflers are ultimate quality priced right. These value-packed exhausts make no compromises in performance or style. They feature a straight baffle, a unique shape capable of installing an optional low-volume insert, , plus a choice of materials—stainless steel or carbon fiber—for the muffler sleeve. From the beautiful lines of the tri-oval shaped canister, to the turndown tip of the polished stainless steel end cap, Yoshimura TRS mufflers offer the performance and style of race-bred winners. Order the model recommended for fitment on your bike application.
Not Yet Reviewed
$459.00
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