Camshaft, Valve Spring, Oil Pump, Inner Shim KIT
Up Rated Valve Springs can be used with stock camshafts?
Yes, we recommend it to improve valve following capability in high RPM and prevent valve surging.
What other parts do I need to use a VTEC Killer High Power Profile Camshaft?
Rocker arm plugs, rocker arm spacers, and up rated valve springs are necessary in valve operating system, and we recommend Sports Injection KIT. Also a programmable ECU is necessary to control the engine.
What is the best valve timing for High Power Profile Camshaft?
It depends on cam profile and engine specification. Please use reference data in the enclosed instruction as a base to start from.
How much RPM can Up Rated Valve Springs hold up to?
It depends on vehicle model. Basically up to 1,000 RPM over the manufacturers set rev limit for that vehicle will be ok. But running conditions and vehicle specifications can also affect this performance. Please use this information as a guide only..
Up Rated Valve Springs are all progressive pitch coil springs?
Yes, they are all progressive pitch coil springs except for the SR20.
Stock valve springs can be used with High Power Profile Camshaft?
Stock valve springs can NOT be used with High Power Profile Camshaft except for 3SG(SXE10) IN:268(12.0) EX:264(11.0). Please use Up Rated Valve Springs helping to prevent valve floating valve bounce and spring surging.
Why are there two types of B16A Heavy Duty Oil Pumps? Which one should I use?
There are two types of B16A stock oil pump. They can not be recognized from vehicle identification number. Please check the size of your own oil pump when you order.
Is the capacity of the Heavy Duty Oil Pump higher than the stock oil pump?
No, it is the same. Heavy Duty Oil Pump is made from stronger material to help prevent pump and engine damage at high RPM.
Can I order spring retainers only in Inner Shim KIT?
Yes, each part can be ordered separately.
How long does it take to re-profile M16A(Swift Sports) camshafts?
It takes about 4 - 5 days after receiving of normal camshafts. For exhaust camshafts with adjustable cam sproket, it takes about a week to 10 days.
Can I use High Power Profile Camshaft with standard pistons?
Yes. Please make sure the clearance between pistons and valves is enough in installing.

Stock clutch covers and discs can be used with Ultra Light Weight Chrome-molly Flywheel?
Yes, Ultra Light Weight Chrome-molly Flywheels are designed with the original features included so that they can be used with stock clutch covers and clutch discs.
How much extra H.P. and torque can the strengthened clutch cover and disc take?
It somewhat depends on the model, but the Sports Disc KIT is designed with a 40% performance improvement compared with stock parts.
What is the difference between High Power Single Clutch KIT and Sports or Metallic Disk KIT?
High Power Single Clutch KIT is specifically designed for racing, and reducing inertia with the small clutch disc and thin model metallic facing. As for the cover, light weight material is used with high pressure bonding power. It is the best for the purpose to get better lap time in a circuit. For the customers concerning durability and handleability, we recommend to use Sports or Metallic Clutch KIT.

Sports Injection
What injectors can I use with the Sports Injection KIT? What about stock injectors?
Yes, the Sports Injection KIT is designed so that stock injectors can be used. In case that the flow rate is not enough and you would change injectors, please make sure that the new injectors are compatible in shape with the stock items of your car.
What other parts do I need to prepare to install Sports Injection KIT?
Fuel regulators and fuel return hoses need to be prepared. Fuel injectors may be necessary to be changed depending on model and/or tuning volumes. Also a programmable ECU is needed to control the engine.
Can I Sport Injection KIT with stock ECU?
No, stock ECU can not be used. You need a programmable ECU to control the engine.
What does it change if I use air trumpets with different lengths in my Sports Injection KIT?
It's difficult to say that longer or shorter trumpets are better. But basically longer air trumpets tend to get more torque. Some vehicle models do not have enough space in an engine and long air trumpets can not be installed.

Which type of FIGHTEX Damper is damping adjustable?
All types are 18 step damping adjustable. As for separate tank types (ST/EX/EX-G), damping can be adjusted in bump and rebound independently. For more information, please take a look at "FEATURES 2: Seven Types for All Tastes".
Can you give me any advice as to purchasing a FIGHTEX Damper kit (or overhauling, specification change) about cost, type, spring rate, recommended car height, etc?
Sure. Feel free to contact us. You can also change spring rates and/or damping force when you order.

How much clearance between pistons and valves is necessary?
IN:more than 1.5mm and EX:more than 2.0mm are recommended in considering synchronization error of crankshaft and camshaft caused by any stretch or allowance of timing belt or chains.