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  7. EC 27mm + .200" Longer Stainless Steel 5mm Valves for Evolution Cylinder Head
EC 27mm + .200
EC 27mm + .200" Longer Stainless Steel 5mm Valves
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EC 27mm + .200" Longer Stainless Steel 5mm Valves for Evolution Cylinder Head

Part Number: R-52
Online Price: $25.99
Phone Order Price:$29.99
You Save:$4.00(13%)
+.200 longer Evo exhaust valve
Availability: In Stock.

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Description

The new 27mm Valve for the EVO cylinder head is +.200 longer than the original.

The new 27mm exhaust valve was designed to give the EVO cylinder head higher lift capabilities. We made the valves +.200 longer to allow using our 270 valve springs with our 179-50-T2 Titanium Retainers. The valve springs provide 60lbs of seat pressure at 1.200" install height, allowing up to .475 lift (ex. .356 x 1.3 ratio = .4628" or .335 x 1.4 ratio = .469"). We highly recommend using 1/4 diameter chromoly push rods when going over .400" lift. 

Overall Length 3.060
Valve Head Diameter: 27mm(1.062")
Valve Stem Diameter: 5mm


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