RnD Z20 Valve Guide Set - Colidsbro

RnD Z20 Colidsbro Valve Guide Set 

CNC machined with depth stop 

Precision CNC turned, these guides are actually bored through with a boring bar and not just drilled.

• Manufactured from colidsbro material, very hard wearing material with high lubrication properties, these will last five times longer than any traditional bronze guide.

• Intergrated depth stop for easy fitting – if your head is OE spec then installing these guides to the depth stop will sit them just below the top tolerance of installed height (13.8 MM), if your cylinder head has had a bit of a hard time spring seat wise and needs the seat areas re machining, skimming this area by 0.2mm then fitting the guides will still leave them installed to standard spec.

• Valve stem seal barb grip technology, these valve guides will hold a traditional valve stem oil seal in place without a retainer type oil seal being used. 

• Relieved and radiused guide end to help improve air flow around the valve guide and reduce turbulance around the guide releasing them hidden horsepowers. 

• These guides need machine reaming after install , the valve seats will need recutting back concentric after the guides have been installed and reamed.

• Please contact us if you are interested in some extra heavy duty Chrome Nikel sintered valve seats.