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  1. GSC Power-Division Evolution 9 Mivec Camshafts S-Series
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  Stikiller.com: Mitsubishi Lancer Evolution 8 , 9 & X Performance Parts :: Engine :: GSC Power-Divisionís CNC cylinder head for the Evo 4-9

GSC Power-Divisionís CNC cylinder head for the Evo 4-9 #16844
 
GSC Power-Divisionís CNC cylinder head for the Evo 4-9 
 
GSC Power-Divisionís CNC cylinder head for the Mitsubishi Evolutionís 4-9 is nothing less than perfection.

 

GSC starts with a brand new OEM Mitsubishi cylinder head that is checked for port wall thickness and for casting flaws. After a good casting is approved, the steal valve guides are removed and the cylinder head is locked in to our Okuma 5 axis mill and the port work begins. Using the latest in computer aided software GSC has designed new intake and exhaust ports for the 4g63 head along with a reshaped combustion chamber to maximize port velocity and flow. Once the Okuma is finished milling away the unneeded aluminum from the cylinder head the head is removed and cleaned to remove any loose aluminum from the milling process. GSC installs a set of Bronze valve guides into the head and itís off to have a precision valve job to allow for the +1mm over intake and exhaust valves. For the valve job GSC relies on a CNC based Newen Contour-BB to perform precision accurate valve seats specially designed to allow for maximum velocity where it counts most, right at the valve!
 
 
After all machining is finished the cylinder head is hot tanked and pressure cleaned before it is ready for final assembly. When installing each of the black nitrated stainless steel intake and Inconel exhaust valves proper stem height is checked on each and every valve stem. Every valve stem is ground to its OEM height to maintain exact valvetrain geometry. A matched set of GSCís PACALOY Beehive valve spring and titanium retainers are installed using Viton valve seals and the exhaust and intakes are shimmed to provide seat pressures with in 3% of each other. Finally, a spec card is generated and the GSC CNC Cylinder head is ready for a life of extreme performance.
 

Features:


   Most Advanced Port Design available period.
   Exact tolerances and matching port dimensions across all cylinders ports
   35mm Supertech Stainless Steel Black Nitrided Intake valves

   31.5mm Supertech Inconel Exhaust valves for the highest heat capacity
   PACALOY Beehive valve springs for maximum performance up to 11,000 rpm

   GSC Titanium retainer and Chromolly spring seats

   New Bronze/Magnesium Valve Guides
   Valve train and port velocity designed for up to 12mm of camshaft lift
   Available for purchase using a new casting or with a core exchange

   NEWEN BB Valve Job

   Each Head is pressure checked and decked

   Sold Fully Assembled and ready for use
 
Evo 4-9 XR Cylinder head Intake Data Sheet
Evo 4-9 XR Cylinder head Intake Data Sheet
 

Details
 
Weight152.00 lbs
Price: $2,470.00

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