I look forward to hearing back from you in 18 years or so how your Mac valves are holding up. In the meantime, a stock Toyota part that uses stock bracketry, hoses and requires minimum wiring rework that costs less than $20 and can be purchased at every Toyota dealers on the planet, is my choice of fix. The first one lasted 18 years or about $1 per year. I wish it lasted forever but hey....
QUOTE=agent orange]The reason i went with the MAC valves is that its barely any more expensive (cost me $35 for 2 valves, fittings, and mufflers) and i was hoping to find an alternative that would last longer than the yota valves. If the toyota valves were all that great there wouldnt be umpteen threads about replacing them on this board.[/quote]