Advance knock detection system for ford 4.6l/5.4l

[HOODEY]

Just so you don't blow up that v8 during tuning I sugges this product.

http://cgi.ebay.com/ebaymotors/Knock-Guard-Lite-_W0QQcmdZViewItemQQhashZitem3a682ce98dQQitemZ25085 5877005QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccesso ries