Inconel 1mm oversize intake valve (1.8)

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IN Stock
Part number
M04-66551 BP INCONEL
As tested on some of the hardest-working Miata engines on the planet.

These have been discontinued by Supertech, so once these last valves are gone they're gone forever. 

Oversize intake valves will flow better and make more power. Our valves are heavily backcut to give more airflow at a given lift and 1mm oversize for more flow. Plus, we have Inconel!

We've seen valve failures with stainless steel valves on track turbo cars. So now we offer Inconel. They've been tested on some of the most powerful turbo Miatas to see hard track time and have proven their ability to stand the abuse. The exotic 751 alloy can handle much higher heat than stainless steel. It's a lot more difficult to machine and heat treat so they cost more, but it`s well worth it.

Price is for one valve. You will need 8 intake valves for a Miata engine. 1.8 valves are made with slightly longer stems than stock to allow for more precise installation with solid lifters. Machine shop installation is recommended. 

More Information
Part number M04-66551 BP INCONEL
Designed for model year: 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004 (non-MSM), 2005 (non-MSM)
Fits Exocet? Yes
California emissions Emissions regulations do not apply
Manufacturer Supertech
Proposition 65 Warning: Cancer and reproductive harm
Flyin' Miata exclusive No
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