K&N BORLA T-304 Stainless Steel Cat-Back System & Fuel Injection Performance Kit for 91-95 Jeep Wrangler YJ with 4.0L

BORLA Cat-Back™ exhausts feature patented, straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. Each system is built from premium austenitic stainless steel, superior to T-400 series knockoffs, to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, BORLA stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.
K&N's Fuel Injection Performance Kits (FIPK) are designed to promote performance in stock fuel injected engines by allowing air filtration with least resistance in air flow. In addition to the filter, these kits have uniquely designed adapters, creating a radius entry that reduces restriction and allows the engine to breathe a greater volume of air.
The filter recharger kit is sold separately.
Achieve horsepower gains even under varying atmospheric conditions with an FIPK kit which replaces the entire air intake, isolating the cold air with the use of a custom heat shield and directing the air through a unique chamber delivery system. Dyno test results showed torque increases through the towing ranges of no less than 23 ft. lbs. FIPKs are legal in all 50 states.

To ensure all the power and performance that your fuel- injected engine is capable of providing, install a high-quality K&N Fuel Injection Performance Kit and feel the power! You'll get better acceleration, instant power, and ease in lane changing and passing even while towing. And remember, K&N delivers performance that's guaranteed for 10 years or one million miles, whichever comes first.

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.

Installation Notes

Installation Difficulty:

Level 2Intermediate

Installation Time: 2-3 hours

Parts Included

Filtercharger Element
Intake Tube
Heat Shield
Angled “L” Bracket
“L” Bracket
Saddle
2 Rubber Mounted Studs
Mounting Hardware
Installation Hardware
Borla Catback Exhaust