Bypass Valve for 355 or F50

I'm selling an exhaust bypass valve for Ferrari F355 or F50 (Ferrari part # 155006). The valve was nicely refurbished and adjusted to better than original specs. It will not rattle + I changed the inner O-ring seals using a brass plated nickel material. I also adjusted it so it will open the exhaust between 2500 and 3000 RPM as opposed to 3500 - 4000 RPM, so you should hear a much better exhaust sound coming sooner when accelerating. My price $850, the original factory Bypass sells for over $1300, the seals alone sell for $245 each.

(Also listed on eBay)
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sold