SUBARU Engines & Components

ARP Pro Series Cylinder Head Studs

ARP Pro Series cylinder head studs are cold-forged to ensure molecular integrity. They're heat-treated prior to thread rolling and machining. ARP Pro Series kits are also available with 12-point nuts, and all studs come complete with hardened parallel washers for an even load distribution and accurate torque readings. With hundreds of models ready to ship, these cylinder head fasteners can be ordered for virtually any style engine.

4.8 out of 5 stars ( 820 )

$533.99

ICON Premium Forged Piston and Ring Kits

You don't need a king's ransom to rule the track, thanks to ICON premium forged piston and ring kits. They deliver high-performance racing pistons crafted from high-strength, primary aluminum alloys and matching performance piston rings. The pistons feature fully machined heads and valve ports, advanced accumulator and mini groove technology, drilled pin holes, triple-wound spiral lock rings, and their proprietary diamond-finished skirts. ICON premium forged pistons can handle the pressure and abuse from the horsepower numbers that your engine produces. If you're ready to give up your kingdom to build more horsepower with a great set of pistons--think again! The ICON premium forged pistons and ring kit best suited for your application will help you reign victorious without spending a lot of cash.

4.6 out of 5 stars ( 20 )

$608.70

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$628.63

VEGE Remanufactured Cylinder Heads

VEGE Remanufactured cylinder heads are a popular choice for performance and value. With its advanced and efficient production process, backed by more than eight decades of experience, VEGE is able to supply remanufactured cylinder heads with a level of quality that equals that of new OEM products—at extremely competitive prices. The rebuilt cylinder heads are carefully inspected, cleaned, and then fully machined and assembled with top-of-the-line components. Unless otherwise noted, the assemblies include a cast iron or aluminum cylinder head, intake and exhaust valves, valve springs, retainers, locks, stem seals, rocker arm studs, and more. Many heads include rocker arms. Nearly a thousand models are available, for fitment on countless applications.

3.79 out of 5 stars ( 47 )

$555.99

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$676.99

COBB Tuning Air/Oil Separators

Factory crankcase ventilation systems recirculate dirty oil vapors back into the intake system causing an increase in crankcase pressure and a loss of engine efficiency over time. Thankfully, COBB Tuning has you covered with their well designed air/oil separators that prevent harmful oil vapors from entering the intake and creating a build up overtime. Decrease your crankcase pressure and increase your engine efficiency with COBB Tuning air/oil separators today! Other features and exclusive details include: * Efficiently decreases crankcase pressure by giving each engine vent port its own connection to the separator * Includes all necessary hardware for installation * Heat shielding on the crankcase breather and oil return lines * Coolant bleeder valve * Bespoke COBB color combination * Laser etched COBB logo

Not Yet Reviewed

$610.00

Manley Platinum Series Pistons

Manley Platinum Series pistons are designed to provide trouble-free installation, excellent reliability, and maximum horsepower for your application. Available in 2618 and 4032 forgings, they provide the optimum balance between strength and weight, with no grain-interrupting internal milling. The Platinum Series pistons' 2618 alloy offers maximum high-temperature strength and fatigue resistance, while the 4032 alloy is ideal for moderate-horsepower street applications. Order the style and size pistons designed for your vehicle and engine.

4.33 out of 5 stars ( 6 )

$699.21

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$705.96

Manley Steel H-Beam Connecting Rods

Manley steel H-beam connecting rods are made from forged 4340 steel alloy. They're packed full of performance features, such as a compact uniform-grain structure for ultimate strength, full machining, stress relieving, and magnafluxing. The wrist pin and big end bores are honed to a +/-.0002 in. tolerance, and the wrist pins get a bronze alloy bushing. These units include cap screw ARP 8740 alloy rod bolts, and each rod set is weight-matched to within 2 grams. Available individually or in a set, order the model recommended for your vehicle year/make and engine application.

4.5 out of 5 stars ( 10 )

$540.29

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$615.56

Clearance

Mahle PowerPak Piston and Ring Kits

Mahle PowerPak piston and ring kits include forged pistons, low-drag rings, steel pins, and wire locks—all in one race-proven package. The pistons are hand-deburred and then coated with dry phosphate to protect against ring micro-welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti-friction coating to the piston skirts. These replacement packages are available in a wide variety of size options for fitment with specific engines and pistons.

4.95 out of 5 stars ( 22 )

$1,038.78

$631.10

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$749.50

Wiseco Sport Compact Piston and Ring Kits

Wiseco sport compact piston and ring kits give you stronger pistons and tighter tolerances than any other part in your engine, with less internal and external machining. Wiseco's advanced forging process and extensive heat-treating and finishing processes ensure the performance and reliability that you demand from your engine. These kits' crown thickness and ring lands are designed for power-adders like turbos and blowers and nitrous oxide. They come complete with high-quality piston rings. Whether you're on or off of the street, you can depend on the maximum strength and minimum variance of Wiseco's aluminum-forged pistons for your sport compact vehicle. Choose the kit recommended for your make and engine application.

5.0 out of 5 stars ( 5 )

$717.99

Manley Extreme Duty Series Stainless Steel Valves

Manley Extreme Duty Series performance steel valves are a great choice for supercharged, alcohol-burning, or high-revving engines. These engines generate a lot of heat and require special valves that can handle that kind of punishment. All valves are made from the best stainless steel available, with chrome stems and hardened valve tips. Extreme Duty Series valves are swirl-polished and fully machined and available with either undercut heads or straight stems.

4.5 out of 5 stars ( 2 )

$548.34

Scat Pro Sport H-Beam Connecting Rods

These H-beam connecting rods are the strongest Scat connecting rods available. These Scat H-beam connecting rods are perfect for supercharged and nitrous applications. These rods incorporate a special doweled cap for specific cap-to-rod alignment and are profiled with extra clearance for stroker applications.

4.81 out of 5 stars ( 43 )

$508.99

Mahle PowerPak Plus Piston and Ring Kits

What kind of power are you packing? Mahle PowerPak Plus piston and ring kits possess the attributes that you seek for the competitive edge that you want. Built from forged aluminum, these PowerPak pistons are hand-deburred and phosphate coated and then given Mahle's proprietary Grafal anti-friction coating. The lightweight kits also include low-drag slipper skirts, CNC-machined pin bores, machined ultra-flat ring grooves, and Mahle low-drag rings. These power-packed, race-proven packages provide you with unmatched consistency and performance. What separates you from the competition? It's the fact that you've chosen the power of Mahle PowerPak Plus piston and ring kits.

4.0 out of 5 stars ( 6 )

$742.16

CP Pistons Arias Piston and Ring Kits

In 1969, Arias Pistons was started and forged with a reputation for power for over 40 years. In 2017 CP-Carrillo acquired Arias Pistons to continue their legacy. CP Pistons Arias piston and ring kits deliver lightweight, high-strength construction and excellent performance. The pistons are forged from high-tensile strength 4032 or 2618 billet materials with CNC-machined working surfaces, optimized crowns for efficient combustion, and diamond-turned ellipsoidal skirt profiles. Arias piston kits are available in many different bores and piston styles, and will include quality rings, wrist pins, and retainers. Make your choice from the extensive list of Arias piston and ring kits offered by CP Pistons.

Not Yet Reviewed

$741.30

ICON Elite Forged Piston and Ring Kits

If you are looking to step your engine program up to the next level, ICON Elite forged pistons and ring kits have exactly what you are looking for. Made exclusively from 2618 aluminum, the Elite Series pistons are purpose built from top to bottom to perform consistently in extreme conditions. ICON's Elite forged pistons feature their Line2Line adaptive skirt technology coating that reduces friction between the piston and cylinder wall, while providing additional protection at start-up. They come standard with an anodized top ring groove to greatly reduce micro-welding that can occur under detonation conditions, and an anodized piston crown to help focus the heat in the piston crown and improve combustion efficiency. ICON Elite forged piston and ring kits include pistons and ring stack. Select the Elite kit designed for your build. Additional features: * Upgraded wrist pin * Mini grooves * CNC-machined valve reliefs and crown * Diamond CNC-turned skirts * Accumulator groove * Dual forced pin oiling * Lateral gas ports on high-compression designs * Spacer rings provided for shorter compression height pistons

Not Yet Reviewed

$742.58

JE Pistons Subaru EJ Series Pistons

JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import, and sport compact applications, and they have been performance-proven in victory lane time and time again. JE Pistons Subaru EJ Series pistons are single replacements. Available in different bore sizes for right or left, the pistons are specifically engineered for extreme applications up to, and including, professional competition. In such environments, the higher compression ratios and boost necessitate the high-tensile strength of forged 2618 aluminum construction. The skirts feature a proprietary Forged Side Relief (FSR) forging design that minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin. High-quality wrist pins, locks, and piston rings are included. Equip your engine with the best in forged pistons—JE Pistons.

Not Yet Reviewed

$574.99