Hitting the 'sweet spot' for M-8 upgrades, Twin Power has added 4.25" Big Bore cylinders for M-8 models to its product line - factory fitted for the popular Wiseco Black Edition pistons.
When combined with Twin Power gaskets, a 107 cubic inch engine can be converted to 124 cubic inches, and a 114 cubic inch to 128 cubic inches. This is strictly a bolt-on kit, as the special gaskets eliminate the need to weld or otherwise modify oil and water passages.
Machining of the crankcase is not required either. Gasket kits are available with either .030" or .040" thick head gaskets, based on the builder's preference.
The cylinders are offered in a factory style black textured powder-coat finish with highlighted fins. Cast-in iron liners ensure strength, durability and quiet operation. Cylinders are sold in pairs and include cylinder head dowels.
"The M-8 has shown incredible performance potential, and this kit really wakes up the stock engine," says James Simonelli, Twin Power Brand Manager. "On a 107" Dresser with no headwork, TTS 250 cam and valve springs, 62 mm throttle body, a performance intake and 2:1 exhaust, we achieved 139.63 hp and a whopping 142.65 ft. lbs. of torque with a tabletop flat torque curve."
Twin Power has also added these new heavy-duty axle and adjuster kits for 2002 and later Dresser models, including 2019 M-8.
Featuring a solid stainless steel axle machined from 316 material that will not rust or seize to the wheel bearings, the adjusters are hard chromed steel with 4140 steel adjuster screws. All additional hardware is Grade 8 and installation tools and instructions are included.
"The high-performance Bagger scene is exploding," says James. "Large displacement engines, turbos and superchargers are becoming the norm. These mods will easily overwhelm the stock belt drive and snail cam style adjusters, and typically also require a chain drive conversion kit.
"In addition to the extra strength, these kits also allow a greater range of axle adjustment and are a perfect addition to our popular cush drive chain conversion kits. They are also priced more reasonably than many of the other kits on the market, but give you the quality that you've come to expect from Twin Power".
Kits are 100% USA made and simple to install with only a minor spotting and drilling modification required.
Also seen here, these new Twin Power replacement fuel pump kits feature all the components necessary to rebuild the O.E.M. fuel pump module, including pump, filter, hoses, clamps and wiring harness as needed.
James Simonelli explains: "Ethanol fuel blends can really wreak havoc on American V-twin fuel systems. Extended periods of storage further compound this problem. These kits give you everything you need to correct these problems and offer a competitively priced solution to factory components (which in some cases are obsolete)."
The kits are available for all 1995-2017 factory fuel injected H-D models, come ready for plug-and-play installation and feature a Limited Lifetime Warranty.