Valve guides 0EM vs Bronze ? OEM part# confusion ?
 

Having a tough time tracking down OEM guides. They will be going into a 99-00 bp4w head. The Mazda parts websites list a guide, part# B6z1-10-290 and b6z1-10-280 for the guides but say they only fit 00-05 heads. And I cant find a part number to cover 94-99.When i look up aftermarket guides they have the same part numbers for 94-05

So even though the mazda parts sites say these wont work in 99 or earlier heads...they are wrong right ?

Also should i just skip oem and go for bronze guides ? I cant find any info on what bronze guides people here use and have a good experience with. I saw that savington/trackspeed used SiValves valve guides. I gave SiValves a call today and they dont have them available right now.

Forgot to mention these are for a forged motor im building. Has supertech heavy doubles and a shim under bucket conversion for the head. Dont plan on spinning it past 7500

I am having my head rebuilt with these Bronze guides from Miataroadster. Works out cheaper than OEM guides and work better, especially in higher revving applications and with aftermarket valves.

https://miataroadster.com/miataroads...i-1964290.aspx

Got a call back from SiValves. They do have some instock and i ordered a set. Hoping they work well with stock 99 valves