06 GC What would you do this?
 

I have a 2006 dodge grand caravan and its time for a tune up . I was thinking of putting a K&N air filter in. Also I was thinking of putting E3 spark plugs in and for the the brakes i was thinking of putting performance brakes on. Should i be upgrading these parts to be more efficient or just use OEM parts. Thanks.

About all you can realistically expect is a 1 mpg bump. Based on $4/gal gas, 25 mpgs bumped to 26, and 20K miles a year you're saving around $125 a year on gas. Do the math and see if the extra bucks you'll spend for the parts can be recouped and still leave you in the black.

I would stick to the stock double champion plugs, I have read to many problems with using other plugs