{"product_id":"cat-back-exhaust-for-nissan-240sx-s13-1989-1994-2-4l","title":"Cat Back Exhaust for Nissan 240SX S13 (1989-1994) 2.4L","description":"\u003ch2\u003eHigh-Flow Cat Back Exhaust for 1989-1994 Nissan 240SX\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The cat-back exhaust system replaces the restrictive factory exhaust piping and baffled muffler on the 1989-1994 Nissan 240SX to lower exhaust backpressure, optimize cylinder scavenging, and increase exhaust gas velocity.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Nissan 240SX Flow Restriction and Corrosion Weakness\u003c\/h3\u003e\n\u003cp\u003eThe original exhaust assembly fitted to the \u003cstrong\u003eS13\u003c\/strong\u003e platform relies on narrow, crush-bent aluminized steel tubing routed through restrictive internal baffle chambers. Over decades of operation, thermal cycling and moisture accumulation degrade the mild steel from the inside out, leading to pinhole leaks, rusted flange joints, and failed exhaust hangers. Functionally, the stock bottlenecks create excessive backpressure behind the naturally aspirated \u003cstrong\u003eKA24E\u003c\/strong\u003e and \u003cstrong\u003eKA24DE\u003c\/strong\u003e powerplants, choking high-RPM gas evacuation and blunting throttle response.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit cat-back exhaust is constructed from high-grade, polished stainless steel to prevent rust and withstand prolonged thermal stress. The system utilizes continuous 3-inch mandrel-bent tubing to maintain uniform cross-sectional diameter throughout bends, eliminating flow turbulence and friction loss. High-strength welded flanges mate to the catalytic converter assembly, while pre-positioned OE-style hangers anchor directly to factory chassis rubber isolators. Flow transitions into a straight-through performance muffler with a 2.5-inch outlet tip, balancing acoustic resonance control with unimpeded exhaust flow for measurable gains across the mid-to-high powerband.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; margin-bottom: 20px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1989-1994 Nissan 240SX\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eKA24E\u003c\/strong\u003e (1989-1990), \u003cstrong\u003eKA24DE\u003c\/strong\u003e (1991-1994) \/ \u003cstrong\u003eS13\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e140-155 hp \/ 152-160 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003eN\/A (MPN: \u003cstrong\u003eSPT-CBK-NS13-D\u003c\/strong\u003e)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1989-1990 Nissan 240SX Base \/ SE \/ XE Hatchback \u0026amp; Coupe 2.4L SOHC (\u003cstrong\u003eKA24E\u003c\/strong\u003e) \u003cstrong\u003eS13\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e1991-1994 Nissan 240SX Base \/ SE \/ LE Hatchback, Coupe \u0026amp; Convertible 2.4L DOHC (\u003cstrong\u003eKA24DE\u003c\/strong\u003e) \u003cstrong\u003eS13\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the S13 240SX?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1989-1994 Nissan 240SX equipped with the \u003cstrong\u003eKA24E\u003c\/strong\u003e or \u003cstrong\u003eKA24DE\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this bolt-on cat-back exhaust require ECU tuning or cut-and-weld modification?\u003c\/strong\u003e\u003cbr\u003e No ECU recalibration is required, and the system bolts directly to the factory catalytic converter flange using supplied hardware.\u003c\/p\u003e\n\n\u003ch3\u003eThe Nissan JDM Tuning Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the demanding tolerances of the \u003cstrong\u003eS13\u003c\/strong\u003e chassis, this exhaust delivers the low-restriction acoustic clarity and high-RPM power support required by Nissan rear-wheel-drive performance builds.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50622364090616,"sku":"DS-EP56O0XTL","price":313.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/cat-back-exhaust-for-nissan-240sx-s13-1989-1994-2-4l-1.jpg?v=1790263625","url":"https:\/\/performancechiptuning.com\/fr\/products\/cat-back-exhaust-for-nissan-240sx-s13-1989-1994-2-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}