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http://greenhulk.net/forums/showthread.php?t=235734

No, it doesn't come with straps. But you can tie a knot on your straps and be good to go. I had this for 2 years without any problems.

Yeah, they will fit on your 2015. Also you can buy it from here

http://www.4-tecperformance.com/index.php?main_page=product_info&cPath=18_1&products_id=4264

I think it is for the oil pressure sensor. Disconnect the hose from the throttle body under it you should see a plug that's where it goes.