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65mm (2.5") diameter
11k (615 in/lb) spring rate
Swift p/n Z65-178-110
Price is for a pair of springs
I just installed the Borla exhaust on the MX5. Sweeeeeeet! Thanks, Andy
Hey Brian, Recieved my Borla Dual Muffler Sport today from Fedex, and installed it in about 30-45 minutes. An Outstanding product with absolutely no drone throughout the power band, it sounds powerful, not at all like one of the ricey "fart tubes" that can be found elsewhere online. It has perfect like OEM fitment. Great prices, and great products. Product was shipped promptly and arrived as ordered. Would buy again!