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91-09
Jeep - 4.0L, 3.8L & 2.5L
Monster Flow, Performance, Sound & Looks
Huge 2.5" stainless mandrel-bent tailpipe with a polished tip. Straight-thru Monster muffler flows up to 140% better than stock. Slashes backpressure; throaty sound.
Monster® Exhaust, 4.0L & 2.5L
1991-05 4.0L and 2000-02 2.5L 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. Banks Monster muffler, its straight-through performance muffler, is the industry's least restrictive. In comparison tests, Banks muffler flowed 501.2 cfm at 1 psi—a 140% improvement over the stock exhaust's 208.6 cfm, and about 44% better than the nearest competitor.
Monster virtually eliminates backpressure from the catalytic converter back, for more power and efficiency—and an authoritative, yet civil, exhaust note. For maximum results, combine with Banks TorqueTube® system.
Includes: Stainless Monster muffler; Stainless 2.5" tailpipe; Polished stainless tailpipe tip; Mounting hardware.
| Application | Year Range | Part # |
|---|---|---|
| Monster Exhaust 4.0L Wrangler | 1991-95 | 51311 |
| Monster Exhaust 2.5/4.0L Wrangler | 1997-99 | 51312 |
| Monster Exhaust 2.5/4.0L Wrangler | 2000-03 | 51313 |
| Monster Exhaust 4.0L Wrangler | 2004-06 | 51314 |
| Monster Exhaust 4.0L Unlimited | 2004-06 | 51315 |
Owners Manual(s)
| Monster exhaust ('91-05 Wrangler) (Part #96435) |  Download |
Accolades
“Let someone else use his or her beloved truck as a proving ground. I will wait and purchase a proven product from a time-proven company such as Gale Banks Engineering.”
Turbo Diesel Register (May/Jun/Jul '05)