** Amber Performance are the sole Exclusive Official Authorised Tomei Powered USA Dealer for the UK **


High quality designed springs is required to transfer the exact movement of the camshaft to the valves at high engine speeds on high performance engines. The TOMEI products are always engineered with precision in mind to suit the user’s needs. So with this in mind careful choices in material selection is made with surface coating and other technologies. Then the pre-production products are put through an extensive testing program for checking durability, quality and performance. We spend time and money to help you save your valuable time and money.

By combining several steps of spring rates into the one spring and vibration frequency becomes amazingly high. This greatly minimizes resonance and the chances of surging.

The surface treatment method for making nitrogen permeates the spring and gives it large surface compression repulsion. This method was chosen to raise the fatigue limit to suit the demands or running high lift camshafts. The dangers of spring failure is greatly reduced with the 1.5 times increase in the springs fatigue limit with the combined use of Oil tempered chromium-silicone alloy steel wire and Nitriding. This is how our valve springs are suitable for use on extreme engine speed conditions of super-high revs exceeding 10,000 RPM which had not been previously possible with high lift camshafts.

 
Fitment Details :    

Make - Mitsubishi                                                           
Model - Evo 4-8
Engine - 4G63
Year - All

IMPORTANT PLEASE READ! 

We will endeavour to post any sale items on a next day basis wherever possible, however if we have a particularly heavy workload or an item is nil stock due to high offline sales this may affect quoted e bay stock & delivery time will be extended. Any time scale quoted is upon receiving cleared payment, to help us, could you please include the item number and your ebay user name in any correspondence. Number of items shown as available is a guide only again due to shifting stock on a daily basis and as all items are available through our showroom or mail order dept. Should this occur and we cannot supply in or around the timescales quoted above we will advise the buyer immediately of anticipated delivery time or refund their payment whichever is preferred. If you require your parts quickly then please check stock before ordering to avoid any unexpected lead time. We have no desire to receive or place any negative feedback in any circumstance and hope you understand.
Amber Performance