BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | STREET EXHAUST EXHAUST 80 DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 4-6 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. PART # DIAMETER WIDTH THICKNESS 1861-1636 1.42” to 1.53” 0.79” 0.02” 1861-1637 1.57” to 1.69” 0.79” 0.02” 1861-1638 1.73” to 1.85” 0.87” 0.03” 1861-1639 1.89” to 2.00” 0.87” 0.03” 1861-1640 2.05” to 2.16” 0.87” 0.03” 1861-1641 2.20” to 2.32” 0.87” 0.03” EXHAUST PIPE CLAMPS •Made from stainless steel •Corrosion and temperature resistant •Barrel-and-band design for high clamping pressure •Sold individually; packed in poly bag with K&S header card DESCRIPTION PART # Oval, 4” x 5” 1861-0990 DESCRIPTION PART # Round, 3.5” 1861-0991 MUFFLER CLAMPS •Premium-quality polished stainless steel lined with a high-temperature silicone insulator for a secure fit •Ideal for nearly any muffler or silencer canister •Sold each •Made in the U.S.A. DESCRIPTION PART # EMIS* O2 sensor bung, plug and washer set 1861-0728 N/A O2 sensor bung plug 1861-0522 N/A Weld-in O2 sensor bung 1861-0523 N/A Aluminum washer for O2 sensor plug 1860-0545 N/A O2 SENSOR BUNG, PLUG AND WASHER •Weld-in O2 sensor bung allows installation of O2 sensors in any exhaust system; 18 mm x 1.5p •O2 sensor bung plug works with any O2 sensor bung; 18 mm x 1.5p •Aluminum bung plug washer fits any 18 mm O2 sensor bung plug •Sold as a set or each DESCRIPTION PART # EMIS* Weld-on EGT bushing 1861-0525 N/A WELD-ON EGT BUSHING •Allows installation of exhaust gas temperature meter •Sold each DESCRIPTION PART # EMIS* NARROW BAND (2-WIRE PLUG) O2 sensor w/ 12.5” L wire lead 1861-0884 2 O2 sensor w/ 16.25” L wire lead 1861-0885 2 DESCRIPTION PART # EMIS* NARROW BAND (2-WIRE PLUG) (CONT) O2 sensor w/ 22.25” L wire lead 1861-0886 2 18 MM O2 SENSORS •Precision-manufactured with a ceramic body made of stabilized zirconium dioxide, surface-coated with gas-permeable platinum electrodes and a porous ceramic to help prevent erosion due to contamination and particulates in the exhaust gases •Slow-reading oxygen sensors can cause a drop in fuel economy of 10-15%, excessive exhaust emissions and poor drivability •Life expectancy of an average oxygen sensor in a properly tuned engine is typically 30,000 to 50,000 miles •Narrow band O2 sensors available in 12.5”, 16.25” and 22.25” overall lengths; has 2-wire sensor plug •All sensors meet or exceed OE specifications •Sold each •Made in the U.S.A. 1861-0884 1861-0728 1861-1636 1861-0990 1861-0991
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