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Re: supertech svx valves
Yes, the description says STD size and the measurements seem also STD.
The Inconel exhaust valves hold well for boosted engine, they do not melt easily. The Nimonic is superior though.
Whoever wants to boost his engine while keeping lift the same, he should go with these.
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Danny
1994 Silver SVX in hybernation, awaiting for the monsterous awakening (Lebanon) 
1967 Mercedes-Benz 250SL Euro Specs, Hard/Softtop, White/Red. Under Complete Restoration 
2013 Mercedes-Benz SL350 Euro Specs, White/Red. Mint... Another step into SL Collection. 
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