found some great mufflers , made right here in Montreal , just not

sure the size and inlet outlet configuration . Was thinking 4x9x14 18" overall with offset inlet and centre outlet 2 1/2" would that be right ? Or do I need offset in offset out , those only come in 4x9x18 22" overall , or would that be to long ?

http://cortekexhaust.mywebsitepreviews.com/cor4914oc2525