banks monster exhaust

CJ65_JK10

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so i just got back from a trip were i drove from door county wisconsin to watertown ny, 1036 miles. got around 16.5 mpg on the way there. i brought my banks catback with me and went to my childhood friends dads house and 45 min, a sawzall, and a 12 pack later i had her in. sounds great, not really throaty but good. i also changed my oil for the 2nd time and i used royal purple this time instead of castrol GTX. and on the return trip i was getting a consistant 19.5 mpg and even hit 20. this was going 75 mph. so now the rubicon is way up on my list. for 370 bucks it was well worth it.
 

b1pig

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any other mods that you think contributed to the mileage increase? ... and how has it held up over time?
 

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