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Vehicle Info NeededBANKSPART NUMBER: 139-51315-B
Monster Cat-Back Exhaust System, Black Tip for 2004-2006 Jeep Wrangler TJ/LJ 4.0L
$28900
8 left in stock
Ships on Sep 14, 2026
Lowest Price GuaranteeJeep
Monster Cat-Back Exhaust System, Black Tip.Fits 2004-2006 Jeep Wrangler TJ and LJ Unlimited 4.0L Flows up to 140% Better Than Stock Black Tailpipe Tip Sold Individually
A restrictive stock exhaust holds back power and airflow on the Wrangler TJ and LJ. This cat-back system opens up that path with a straight-through muffler design and a larger-diameter stainless tailpipe.
Banks 51315-B Monster Exhaust Construction
- Straight-through Monster muffler flows up to 140 percent better than the stock exhaust.
- 2.5 in. stainless mandrel-bent tailpipe with a black tailpipe tip.
- Virtually eliminates backpressure from the catalytic converter back.
- Includes all mounting hardware for a bolt-on installation.
- Direct-fit application for 2004-2006 Jeep Wrangler TJ and LJ Unlimited 4.0L.
Release the BEAST with Banks! Available for gas and diesel applications, these truck-specific systems bolt on with ease. Monster Mufflers have an expansion chamber reducing mid-range exhaust drone, straight-through flow & high-temp packing. Constant-diameter mandrel bent exhaust pipes maximize flow, reduce exhaust gas temperatures and increases fuel efficiency in the process. Available for all wheel bases with a number of exit and tip configurations.
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Diesel 4" Systems Include:
- Polished stainless 4" Monster Muffler (except 2008 Powerstroke)
- Exhaust pipes (head/intermediate and tail)
- Matte Black stainless, rolled edge, double wall 5" exhaust tip
- Adjustable clamps
- #139-48785-B, and #139-48787-B also include a turbine outlet pipe Gasoline 3" Systems include:
- Polished stainless 3" Monster Muffler
- Exhaust pipes (intermediate and tail)
- Matte Black stainless, rolled edge, double wall 5" exhaust tip (except #139-48130-B has 4" tip)
- Adjustable clamps
Part TypeExhaust System
Product LineBanks Monster Exhaust with Black Tips
BrandBANKS
Package Height8.25
Package Width20.25
Package Length30.5
Weight25.0 PG
Part CategoryPerformance Parts
Part FitmentDirect Fit
Exhaust TypeSingle
Vendor Part Number51315-B
Package Qty1
Package TypeEA
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