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Monster® Exhaust, 3.8L

3.8L V-6: 2007-10 WRANGLER
Constructed entirely of heavy-gauge stainless steel, Banks Monster features a supersized, 2.5-inch tailpipe with a stainless tailpipe tip polished to a mirror finish. Monster Muffler, Banks' straight-through performance muffler, is the industry's least restrictive, more than doubling the stock flow.

Monster virtually eliminates backpressure from the catalytic converter back, for more power and efficiency—and an authoritative, yet civil, exhaust note.

Available for 2-door and 4-door models.

Includes: Stainless Monster muffler; Stainless 2.5" tailpipe; Polished stainless tailpipe tip; Mounting hardware.

undercarriage shot of the Banks Monster exhaust

Banks tip on the 3.8L

Banks tip on the 3.8L

stock vs Banks 3.8L muffler

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muffler airflow results for Jeep 3.8L

ApplicationYear RangePart #
Monster Exhaust
3.8L Wrangler
2-door		2007-11 51321
Monster exhaust
3.8L Wrangler
4-door		2007-11 51322

Owners Manual(s)

Exhaust- Monster Exhaust, Single out the back '07-09 (Part #96494)
3.8L Wrangler		 Tech_icon Download

3.8L Jeep Exhaust

2009-03-26

We love it...

By the way, we love the Exhaust. Very noticeable increase in power and gas mileage...
We had a Monster Exhaust on our 05 F-150 as well!
-Dave R.,  Litchfield Park, AZ

Jeep 3.8L: intake and exhaust

2011-04-20

I have a 2008 Jeep Wrangler Unlimited that I outfitted with a Banks cold air intake and cat back exhaust. The system works great and my mileage is a legit 15% better in town and 20-25% better on the road - depending on speed.

Robert R.
Buffalo, NY

exhaust: Jeep 3.8L

Banks Monster exhaust installed on a 2009 Jeep Wrangler 3.8L V-6.

Accolades

“Company founder Gale Banks is a pioneer in diesel performance.”
AutoWeek (May '05)