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2011-2014 STI Manley Valvetrain Components

Manley Valves

Manley Performance has been manufacturing the finest stainless steel valves for over 40 years. Manley valves have been the standard of the industry from their inception, a fact that still remains true as they shift their focus and resources to the Sport Compact Market. The Manley Stainless Race Valves feature chrome stems, hard tips, fully machined surfaces and swirl polishing under their heads. These valves are available in both stock and oversized, so whether your pushing the limits of your motor or just rebuilding with stock size components, Manley has the valve for you. Manley Performance is synonymous with winning and their products power some of the fastest cars around.


  • Note:
  • Sold in sets of 8.
  • FITMENT:
  • Subaru STI 2011-2014
Description Part # MSRP Price Inventory  
36mm Intake Valves (Standard head diameter) 11138-8 $201.48 $175.20 2 available
37mm Intake Valves (1mm Oversized) 11140-8 $201.48 $175.20 4 available
32mm Exhaust Valves (Standard head diameter) 11137-8 $575.92 $500.80 Ships from factory in 2-3 days
33mm Exhaust Valves (1mm Oversized) 11139-8 $575.92 $500.80 2 available
Valve Springs & Retainers

When upgrading your valves it is a must to also upgrade the valve springs and retainers. Manley's valve springs are wound using the cleanest alloy available and are also heat treated to allow for durability. They are specifically designed to be used in high revving applications and are made to take whatever you can throw at them.

Manley titanium retainers are made of rugged and certified, heat treated aerospace grade titanium. They are a must for any high performance engine revving past the stock limits. The light weight mass allows the motor to rev higher safely, but still keeps dangerous valve float in check. Manley has designed these with the highest quality standards and it shows in every aspect.


  • Note:
  • Sold in sets of 16.
  • FITMENT:
  • Subaru STI 2011-2014
Description Part # MSRP Price Inventory  
Titanium Retainer Set 23180-16 $252.00 $198.00 1 available
Valve Spring Set 22180-16 $114.24 $89.76 Ships from factory in 2-3 days
Mon-Fri 8am-6pm
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1635 Bustleton Pike, Suite B, Feasterville, PA 19053
Tel: 215.489.2820
Hours:
Mon-Fri 8am-6pm

©2016 JSC Speed Inc.
All Rights Reserved.

1635 Bustleton Pike,
Suite B
Feasterville, PA
19053

Tel: 215.489.2820