K&N BORLA T-304 Stainless Steel Cat-Back System & Fuel Injection Performance Kit for 91-95 Jeep Wrangler YJ with 4.0L
Complete Intake & Exhaust Performance Package: Combines a high-flow K&N intake system with a premium BORLA cat-back exhaust for enhanced engine breathing.
Improved Airflow Efficiency: Designed to increase the volume of air entering and exiting the engine for optimized performance potential.
BORLA T-304 Stainless Steel Construction: Premium stainless steel exhaust components provide exceptional corrosion resistance and long-term durability.
Reusable High-Flow Air Filter: K&N's washable and reusable filter design delivers long service life while reducing replacement filter costs.
Vehicle-Specific Performance Upgrade: Engineered specifically for 1991–1995 Jeep Wrangler YJ models equipped with the 4.0L engine.
CARB Notice
- 50 State Legal - CARB E.O. Number D-269-22
Unlock the performance potential of your Wrangler with the K&N Fuel Injection Performance Kit featuring a BORLA T-304 Stainless Steel Cat-Back Exhaust System. Designed specifically for 1991–1995 Jeep Wrangler YJ models equipped with the legendary 4.0L inline-six engine, this complete performance package upgrades both the intake and exhaust sides of the engine to improve airflow and enhance driving enjoyment.
The system pairs K&N's proven high-flow intake technology with BORLA's premium cat-back exhaust engineering to create a balanced performance solution. The reusable K&N air filter helps maximize incoming airflow, while the BORLA exhaust system utilizes premium T-304 stainless steel construction to improve exhaust flow and deliver long-lasting durability. Together, these upgrades help support improved throttle response, enhanced engine efficiency, and a more engaging driving experience. Whether cruising on the highway, exploring trails, or restoring a classic YJ, this intake and exhaust package provides a comprehensive performance upgrade from two of the industry's most respected brands.
57-1521 Product Specifications
Product Style: 57 Series FIPK
Estimated Horsepower Gain: 12.99 HP @ 4800 RPM
Type: Gen II
Replacement Filter: RC-4630
CARB EO Number: D-269-22
CARB Exempt: Yes
Weight: 11.7 lb (5.3 kg)
Product Box Length: 23 in (584 mm)
Product Box Width: 14.25 in (362 mm)
Product Box Height: 12.13 in (308 mm)
Check local regulations concerning emissions & aftermarket air cleaner assemblies. Because it is not OE equipment it could fail visual inspection.
- Engine Size: 4.0L I-6
- Engine Fuel: Gasoline
- Shipping Weight: 48lb
- Shipping Dimensions: 45in x 15in x 24in (L x W x H)
Jeep Wrangler (YJ)
- 1995 Jeep Wrangler (YJ)
- 1994 Jeep Wrangler (YJ)
- 1993 Jeep Wrangler (YJ)
- 1992 Jeep Wrangler (YJ)
- 1991 Jeep Wrangler (YJ)
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