Mitsubishi EVO X Valvetrain

These valve springs are required for Kelford 214-B and 214-C springs.

Valve Spring Specs:

• Outer O.D.: 0.965"
• Outer I.D.: 0.669"
• Closed Pressure: 77 lbs
• Closed Height: 1.378"
• Open Pressure: 165 lbs
• Open Height: 0.984"
• Coil Bind: 0.886"

Only the best materials go into the GSC Power-Division Beehive valve spring. Each batch is scrutinized for tensile strength properties, ductility, inclusion content, and fatigue toughness.

GSC Power-Division Beehive springs feature some of the most impressive manufacturing techniques in the industry. Our beehive spring uses an ovate wire which utilizes advanced material heat treatment methods for superior load loss capabilities. This spring has the highest level of spring load retention while still maintaining good fatigue throughout the life of the spring. Only the best materials go into the GSC Power-Division Beehive valve spring. Each batch is scrutinized for tensile strength properties, ductility, inclusion content, and fatigue toughness.

The beehive valve spring shape has become the buzz lately. Some have enquired as to the benefits of a beehive spring vs the dual springs that are sold by others. While some might find that the beehive spring design is new it has been used commonly in many OE engines as well as in all of the NASCAR and F1 engines of today. Why? The beehive shape is more stable than standard single or dual cylindrical springs. The beehive design which incorporates an ovate wire is more than capable of the performance demands that were previously only matched by a Dual Springs. With the smaller and lighter retainer used on the beehive valve spring allow for higher RPM and more valve control. So beehive valve springs, with there lighter weight retainers allow for engine's to rev quicker and maintain a more stable valve motion than the traditional cylindrical springs of yesteryear.

• Rev faster
• Lighter components
• More durable design
• Less stress on valvetrain components
• Lower spring frequency for more precise valve control.
• More valve control equals more aggressive cam profiles
• All of these items help to return more power for you to enjoy!

The GSC 5042 Beehive valve spring set, and Grade 5 Titanium retainers. This kit is capable of 9500+ RPMS, with as much as 12mm lift cams.

5042 Beehive spring pressure

• Seat=70 lbs / .400"=170lbs / .550"= Coil bind.

• Max RPM: 9,500
• Max boost: 40psi

These valves feature avionics-quality hard chrome along with a specially applied hard tip. Our engineering staff at Ferrea spends countless hours conducting flow bench tests to achieve an optimum balance of flow, velocity and efficiency in the design of this valve. As a result, these valves incorporate smoother radius and unique undercuts.

These valves have special aerospace quality alloys, including EV8-Z18, which provides high tensile strength. An exclusive two-step slow forging process ensures proper grain flow and virtually eliminated any damage to the material structure. The valves are then heat treated and stress-relieved over a 48-hour period, which is the crucial base of our molecular integrity. These valves feature avionics-quality hard chrome along with a specially applied hard tip. Our engineering staff at Ferrea spends countless hours conducting flow bench tests to achieve an optimum balance of flow, velocity and efficiency in the design of this valve. As a result, these valves incorporate smoother radius and unique undercuts.

These exclusive features are what make the Ferrea Competition Plus Valves unequaled in performance and reliability!

Intake Valve Specs

• Head Diameter = 36mm
• Stem Diameter = 5.47mm
• Overall Length = 113.25mm
• Tip Length = 4.24mm

• Head Diameter = 30mm
• Stem Diameter = 5.46mm
• Overall Length = 105.9mm
• Tip Length = 2.32mm

Kelford Cams, world leader in camshaft design and manufacture for high performance Japanese engine makes is set to release their new 4B11 camshafts. Utilising ultramodern design principles, casting techniques and state of the art CNC grinding, these camshafts will again lead the way in EVO engine development.

Kelford Cams, world leader in camshaft design and manufacture for high performance Japanese engine makes is set to release their new 4B11 camshafts. Utilising ultramodern design principles, casting techniques and state of the art CNC grinding, these camshafts will again lead the way in EVO engine development.

Kelford Cams, world leader in camshaft design and manufacture for high performance Japanese engine makes is set to release their new 4B11 camshafts. Utilising ultramodern design principles, casting techniques and state of the art CNC grinding, these camshafts will again lead the way in EVO engine development.

• Designed for a rev range of 3000-7500rpms
• New Billet Design!
• the S1 cams work well on the stock valve springs
• Intake 264 / 220 @ .040" / Peak Lift 10.2mm
• Exhaust 264 / 216 @ .040" / Peak Lift 10.0mm

The GSC Power-Division S2 cams for the Mitsu Evolution X are designed for those with 600HP+ in mind. Gains of 40-80whp (depending on Turbo) have been seen by simply bolting the S2 cams in.

• Designed for a rev range of 3800-8500rpms
• New Billet Design!
• The S2 cams require an upgraded valve spring.
• Intake 274 / 230 @ .050" / Peak Lift 11.2mm
• Exhaust 274 / 230 @ .050" / Peak Lift 11.0mm