I have been selling Canyon valve guides for many years. I have found that they have the dimensional tolerances down and material right. I have not had any premature wear or returns on Canyon products, ever.
One thing I have really liked about Canyon was the sizing of their guides. They have dialed in on what works and produce the sizes people are looking for. Most OE guides are too small or too big needing reaming of the head.
Company:
Canyon Engine Components & Canyon Engine Components Parts offer - Manufacturer of internal engine components, including valve guides, valve seats, engine studs, bushings and thread repair inserts for Mercedes-Benz, BMW, Porsche, VW and Audi.
Products:
We carry a large variety of Canyon Engine Components exhaust and intake valve guides for your Mercedes, BMW, Porsche, Audi, Volkswagen, Saab, Volvo and Mini automobiles.