13s and 15mpg Magnum head 360

theres nothing that puts fear in muskrats and chebbies like hearing the sound of a thermaquad. when it opens up people always look, you can hear them over the motor trying to suck the hood thru.maybe loose a little performance maybe not, just have to test and tune .for daily drivers and weekend thrillers therms are cool. GReat start to a great street combo. :toothy7: