My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Supertech Performance MAIVN-1204 High-Performance Engine Valve

(1994-2005 Mazda Miata; 1990-1999 Mazda Protege; 1991-1996 Ford Escort)

Manufacturer

Picture for manufacturer Supertech Performance

Part Number

MAIVN-1204
16 reviews
Sale Price

$20.76

Estimated ship date Saturday, November 28

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Supertech Performance brings over 20 years of precision manufacturing experience to their line of high-performance engine valves. Engineered through intensive testing and close collaboration with professional engine builders, Supertech valves deliver exceptional flow rates, long-term durability, and consistent quality across a wide range of applications.

Supertech recognizes that every engine has unique demands, which is why their valves are available in multiple materials and finishes to match any build requirement.

Available Materials:

  • Stainless Steel (EV8 / 21-4N Alloy): One-piece forged construction for maximum strength and reliability. Supertech primarily uses EV8 (21-4N) alloy for both intake and exhaust valves, with additional alloy options and heat treatment variations available for specialized applications.
  • Inconel 751 Nickel-Base Alloy: Designed for extreme-heat exhaust applications, such as turbocharged or supercharged engines where exhaust valves are subjected to very high operating temperatures.

Protective Coatings:

  • Chrome Coating: A widely used finish in performance valve applications, providing an added layer of surface hardness and heat resistance.
  • Black Nitride Treatment: A surface-hardening process that produces a smoother finish than chrome, reducing friction between the valve stem and guide for improved longevity and performance.

Note: Supertech valves are sold individually, per valve. Please order the exact quantity required for your engine build (e.g., order 16 for a 16-valve engine).

Products specifications

Fits

1994-2005 Mazda Miata; 1990-1999 Mazda Protege; 1991-1996 Ford Escort

Head Dia

33.00mm (Std)

Length

102.60mm (+0.6)

Material

Black Nitrided

Stem Dia

5.96mm

The delivery time could have been better..

Says it should be delivered in two days. We shall see.

Quick understandable

Super price on surprisingly good quality tires. Looking to see how they mount and wear! Thanks for fast shipping (free!) and good job following up!

New customet. I love the price.

Pleased

Professional, expedient. Thank you!

Just as ordered. Superb shipping

Easy to find parts

Autoplicity has the lowest prices anywhere..Customer service is always there to answer any question..Shipping was also fast... Definitly will be doing more business in the future...Thanks Autoplicity !!!!!!

This my first time to purchase from this company and it was easy and fast. I will be back!!!

Great deals at unbeatable prices!

Product was as described, shipping was fast, and communication was excellent. Plus I saved $$. Thanks Autoplicity! I'll be a repeat buyer and referral source.

Great prices, reasonable shipping costs. Shipped within 3 days of order. Didn't receive discount for valid coupon code (25OffShipping). No response to 2 emails. No indication of expected delivery date. Lots of unknowns but you can't beat the pricing.

This was my first order with Autoplicity. I was pleasantly surprised when my order showed up quickly and was exactly what I wanted. I will be buying from this company again. Thanks for the quick service and fair pricing.

I ordered a Thule 9002 Raceway Bike Carrier on Sunday, April 8 and received the product by Fedex on Wednesday, April 11 with just regular shipping. That is fast service. And the price was $43 cheaper than any other site on the internet (including shipping). I haven't had a chance to use the bike carrier yet but it appears to be new and as advertised with no issues as of this writing. I would definitely recommend this retailer for your next purchase. Order Number: 9111

Share icon
Return Policy
Returns are easy at THMotorsports

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy