Stock and TORs

Worste mileage from a rear tyre was straight after I fitted TORS and did a few other things - not so much because of the extra power but because I couldn't help 'trying it out" at every opportunity.
 

that is what happened to me, I added the exhaust at purchase then added the K&N last year, it became louder, seem to run better, but mpg is down 8-9 miles per gallon