Parts Catalog - M8 - Cylinder Heads | Suburban Motors Harley-Davidson

Cylinder Heads - M8

SUBURBAN SPEED STAGE I PORTED HEADS

SUBURBAN SPEED Stage I M8 Ported Heads are a great entry level performance cylinder heads for 2017-UP Milwaukee Eight. These heads utilize our patented superstock valve job with extensive bowl blending. We have increased the air flow and velocity 12% for great throttle response. The valve springs are also upgraded for a max lift of .560. Great heads for 114 to 130 cubic inch engines. These heads have produced over 130 hp and 140 torque. All of our heads are flow bench tested to ensure the performance of the heads.

$999.95 EXCHANGE

Harley-Davidson Cylinder Heads

SUBURBAN SPEED STAGE II CNC PORTED HEADS

SUBURBAN SPEED Stage II M8 Ported Heads have revised intake and exhaust port shapes and are designed to really step up the performance on your 114 to 130 cubic inch M8 engine.These heads utilize our patented superstock valve job with extensive bowl blending and port work. We have increased the air flow on the intake over 17%, and over 20% on the exhaust. Heads will make over 148 hp and 148 ft/lbs torque on 124 to 130 cubic inch engines. Stage II heads have valve springs that will accept up to .560 lift. All of our heads are flow bench tested to ensure top performance of all heads.

$1750.95 EXCHANGE

Harley-Davidson Cylinder Heads

SUBURBAN SPEED STAGE III CNC PORTED HEADS

SUBURBAN SPEED Stage III M8 Ported Heads the ultimate in street performance heads. We have done extensive flow bench and dyno testing to come up with an all out street head. We utilize the Screamin' Eagle intake & exhaust ports and revise  the size and shape to have more velocity and flow more air. Stage III heads come with up graded valve springs that will accept up to .560 lift. All of our Stage III heads are flow bench tested to ensure outstanding quality and performance. (MUST USE SCREAMIN' EAGLE CASTINGS FOR PORTING)

$1750.95 EXCHANGE
$2639.90 NEW CASTINGS (NON EXCHANGE)

Harley-Davidson Cylinder Heads

MILWAUKEE EIGHT ADJUSTABLE ROCKER ARMS

   These adjustable rocker arms are designed to get the proper valve tip contact.

They correct misaligned rocker shaft pedestal height and valve tip height.

RR INT,  RF EXH Part # 17300069  $47.56

RF INT,  RR EXH Part # 17300070  $47.56

Harley-Davidson Cylinder Heads

SUBURBAN SPEED MILWAUKEE EIGHT 107 TO 126 CI FLAT TOP PISTONS

Suburban Speed and Mahle Motosports have come out with a 126 ci flat top piston for your 2017 Harley-Davidson® Milwaukee Eight. These pistons have a -1.2cc dome to get the compression up to 11.16 to 1. The same research and development has gone into these pistons as the rest of our pistons to give you the highest quality and reliability.
Suburban Speed - Mahle Pistons do not require rebalancing flywheels like some of our competitor pistons.
Mahle pistons feature:
  • Forged from 4032 aluminum for tighter cylinder wall clearances and quieter operation.
  • Forged 4032 alloy with grafal anti-friction coating on skirts.
  • Phosate-coated to reduce micro-welding and pin galling.
  • Pin bores finished on CNC boring equipment.
  • High strength 9310, light weight nitrided steel wrist pins.
  • .053 plasma moly top rings, .053  cast second rings.
  • 3mm low tension oil rings. 

SS148310F01 $459.95
Piston wt. 528 grams

Harley-Davidson Pistons

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