Stainless steel conversion kits include only what’s needed to convert your head to the long-life stainless steel Black Diamond intake valves
Extends the life of the valve train and intake components by as much as 4x over the OEM titanium parts
Includes forged one-piece stainless steel intake valves, wound chrome-silicon heat-treated wire valve springs, ultra-light titanium retainers and hardened steel bases
Components are created using Finite Element Analysis (F.E.A.) software, as well as proprietary camshaft analysis and spring design software
Specifically designed and engineered for each application
Kits do not include valve stem seals unless called out in the application chart
Made in the USA
Let customers speak for us
from 5580 reviews
Perfect
Jeffrey Sturges
09/12/2026
Quality service, prompt shipping; product as advertised
Really a no-frills transaction as they as they all should be: product as advertised, at a good price, delivered promptly. Service on the phone was also very to-the-point and courteous. Will consider buying from Magma again.
DM
08/21/2025
Came in july 31st both levers installed feels really good. Good product
jimmybones-us
08/07/2024
Excellent seller
boyanaboci10
08/07/2024
fast.fast fast love it love it love it thank you thank you
usbmcs
08/07/2024
Awesome thanks guys again
raymondbigdaddy23
08/07/2024
Quick delivery. Cap looks great on bike. Minor modification required to fit.
oldmankels
08/07/2024
Suprisingly fast service I'm actually blowed away how fast it got to me. Thanks.
zx14man
08/07/2024
Great
tmoney.5
08/07/2024
Fast shipping. Great seller!
thrasher911
08/07/2024
Thank you. Recieved in great condition cheers
reinh_shan
08/07/2024
AS DESCRIBED
enriqubehren-0
08/07/2024
Great doing business fast response time and item arrived on time.