In the footsteps of its big 131 crate agent release, Harley is acceleration bottomward on the achievement bend with the absolution of new Screamin’ Eagle Stage Kits, now accessible for 2018-present Softail models and 2017-present Touring models. Now you can get your 131ci displacement (in one case) after throwing bottomward for the accomplished engine; there are three all-new achievement collections that accommodate upgrades like CNC-ported heads, achievement cams, and high-compression pistons, amid added parts, all advised to abstract the best achievement out of your bike.
Screamin’ Eagle Milwaukee-Eight Stage IV Kit: 114ci To 131ci For Baddest Softails
This kit rocks the better displacement of any Harley-Davidson Stage Kit, giving the 114/117ci M-8 agent a addition all the way up to 131ci. According to H-D, this Stage IV Kit is advised to bear best horsepower, all the way to the redline, on baddest Softail models. The patent-protected butt technology allows for the better Harley-Davidson bolt-on agent advancement to any Milwaukee-Eight motor.
Included in the Stage IV Kit are new CNC-ported active with 1mm-bigger valves than previously, and absolutely machined agitation chambers. Combined with the also-included high-lift SE8-517 cam, high-compression pistons, and a 64mm burke anatomy and assimilation manifold, the kit can deliver, H-D says, 135 pound-feet of torque and 124 hp (at the rear wheel) back commutual with Screamin’ Eagle Street Cannon mufflers, which, by the way, are not included. It’s advised to run at high-end rpm and accommodate a cogent addition of torque from canoeing speed.
The Screamin’ Eagle 131 Stage IV Kit is additionally acceptable for Custom Coverage beneath the motorcycle’s branch 24-month agent bound assurance back installed by an accustomed H-D banker aural 60 canicule of purchase; it’s contrarily backed by a 12-month bound warranty.
The kit’s apparatus include:
Screamin’ Eagle Milwaukee-Eight Stage IV Kit: 107ci To 128ci For Baddest Softail Models
Although this Stage IV Kit was fabricated for the abate Milwaukee-Eight 107 powerplants on assertive Softail models, it’s still advised to abstract best application from the mill, all the way to the redline. It additionally includes new CNC-ported active with 1mm-bigger valves than previously, and absolutely machined agitation chambers.
Pair the kit’s high-lift SE8-517 cam, high-compression pistons, and a 64mm burke anatomy and assimilation assorted with a set of Screamin’ Eagle Street Cannon mufflers (sold separately), and you’ll see 127 pound-feet of torque and 124 hp rear-wheel output, according to Harley. This kit is additionally meant to run at aerial rpm and accommodate a big bang in torque.
The Screamin’ Eagle 128 Stage IV Kit can additionally get Custom Coverage beneath the motorcycle’s branch 24-month agent bound assurance if it’s installed by an accustomed H-D banker aural 60 canicule of affairs the bike. Contrarily a 12-month bound assurance applies.
RELATED: Harley Releases New Screamin’ Eagle 131 Crate Engine
Screamin’ Eagle Milwaukee-Eight Stage III Kits: 114ci Or 117ci To 122ci And 107ci To 119ci For 2017 Touring Models
Last but not atomic is the Stage III Kit for Touring models, which H-D says was “developed for the addition attractive for a solid ‘seat-of-the-pants’ torque increase.” The access in displacement and compression are said to addition torque and ability over stock.
Harley additionally claims the Stage III 107ci to 119ci advancement delivers up to 23 percent added application and 17 percent added torque, while the 114ci to 122ci kit boosts ability by up to 15 percent (with 13 percent added torque) back compared to the OEM agent configuration.
The Stage III Kit apparatus include:
As with the added kits, you can opt for Custom Coverage while still accepting the accepted bound 12-month warranty. Some of the models crave added acquirement of added parts, but all bikes crave added acquirement of ECM recalibration with the Screamin’ Eagle Pro Street Tuner. Also, none of these kits will fit the Trike models.
For added capacity and complete fitment advice on all the kits, amuse see h-d.com.