Ordered Catback, need info on CAI

[kcirtap]

I ordered a magnaflow catback 16679 for the ST. Great price. (total of 407 including 5% gst and free shipping.)

But now the Question is there are two CAI to chose from K&n 63-2573 and 57-2573. IS there any physical difference what so ever? One better then the other? Thanks for any info, kind of lost...

 

[JohnnyO]

It's your money, but on a Gen 2 the stock airbox isn't very restrictive. I would just use a K&N replacement filter and call it good.