Manley 99.75mm (+.25mm) Overbore Pistons Subaru WRX 2006-2014 / STI 2004-2021

Rated 5.0 out of 5
Based on 3 reviews
SKU: man612002C-4
Availability: 21 In Stock Learn more
Type: Engine Pistons/Rings
Regular price
$678.86
Regular price
$737.89
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$678.86
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Part #: 612002C-4

Manley forged and dished pistons for the EJ257 are machined of high strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Round wire locks, tool steel wrist pins and piston rings are included with every set at no additional charge. A proprietary multi-step top ring groove machining process assures optimum control of the groove's size, geometry, flatness and finish. Precise pinhole machining results in an exact compression distance as well as precise lock ring groove spacing, size and concentricity. Manley pistons are available in standard size as well as a wide variety of oversize/overbore options to accommodate any high performance engine build.

Note:All Manley pistons include a full set of four (4) pistons, piston rings and hardware.

Specs:

Bore 99.75mm (+.25mm)
Comp Distance 1.209"
Comp Ratio 8.5:1
Cylinder Head 51cc
Dome Volume-22cc
Piston Type Dish
Rod Length 5.141"mm
Stroke 79mm
Weight 422g
average rating 5.0 out of 5
Based on 3 reviews
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Review posted
Reviewed by Victor M.
Verified Buyer
Rated 5 out of 5

Perfect!

Love the parts fit perfect definitely recommend

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Reviewed by Rafa, from United States
Rated 5 out of 5

Manley platinum pistons Update

Update: pistons lasted 26k miles. Piston 4 broke ringlands.

Reason for failure: machine shop states: too much boost (24pounds), pistons need more than .21 piston to wall clearance if running more than 20 pounds of boost.

Overall: 05 Sti was used as a daily driver, with power gradually increasing pistons started to burn oil after 15k, about a quart a month. at 24k 1 quart a week, at 26k lots of vapor and 1 1/2 quarts a week till kaboom!. Overall tough pistons withstood lots of abuse

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Reviewed by Rafa, from United States
Rated 5 out of 5

Manley pistons on 2005 subaru sti

Used theses pistons on my EJ257 rebuild. matched this with BC RODS and stock crank. Pistons are very vey quiet used .21 for clearances, assembled by yours truly. currently 5,000 miles on a break in tune. very happy with this pistons.

Update: pistons lasted 26k miles. Piston 4 broke ringlands. Reason for failure: machine shop states: too much boost (24pounds), pistons need more than .21 piston to wall clearance if running more than 20 pounds of boost. Overall: 05 Sti was used as a daily driver, pistons started to burn oil after 15k, about a quart a month. at 24k the car 1 quart a week, at 26k lots of vapor and 1 1/2 quarts a week. Overall tough pistons withstood lots of abuse

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