{"product_id":"cat-back-exhaust-for-honda-civic-si-2007-2011-2-0l","title":"Cat Back Exhaust for Honda Civic Si (2007-2011) 2.0L","description":"\u003ch2\u003eHigh-Flow T-304 Stainless Steel Cat Back Exhaust for 2007-2011 Honda Civic\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The cat-back exhaust system replaces the restrictive factory exhaust on the 2007-2011 Honda Civic Si to reduce backpressure, accelerate exhaust scavenging, and optimize high-RPM gas velocity.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Honda Civic High-RPM Flow Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFrom the factory, the 8th generation Civic Si exhaust relies on narrow, press-bent tubing and a heavily baffled chambered muffler to minimize sound levels. While effective at dampening NVH, these tight bend reductions impede exhaust gas velocity precisely when the high-revving \u003cstrong\u003eK20Z3\u003c\/strong\u003e engine engages its VTEC crossover above 5,800 RPM. The resulting thermodynamic bottleneck creates parasitic backpressure upstream at the header, raising cylinder temperatures and choking off peak volumetric efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit cat-back system replaces the OEM restriction with continuous 2.25-inch mandrel-bent \u003cstrong\u003eT-304 stainless steel\u003c\/strong\u003e piping terminating in a 4.5-inch polished tip. Mandrel bending preserves a uniform cross-sectional diameter across all bends, eliminating flow turbulence and maximizing kinetic exhaust scavenging. Pre-welded, heavy-duty hangers integrate seamlessly with OEM rubber isolators for a secure bolt-on install. The straight-through, low-restriction muffler reduces exhaust gas temperatures (EGTs) and provides complete corrosion resistance under intense heat cycles.\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;\"\u003e2007-2011 Honda Civic\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\u003eK20Z3\u003c\/strong\u003e \/ \u003cstrong\u003eFG2\u003c\/strong\u003e (Coupe), \u003cstrong\u003eFA5\u003c\/strong\u003e (Sedan)\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;\"\u003e197 hp \/ 139 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007-2011 Honda Civic Si Coupe 2.0L (FG2)\u003c\/li\u003e\n  \u003cli\u003e2007-2011 Honda Civic Si Sedan 2.0L (FA5)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the FG2 and FA5 Civic?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2007-2011 Honda Civic equipped with the K20Z3 engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill installing this cat-back trigger a Check Engine Light (CEL)?\u003c\/strong\u003e\u003cbr\u003e No, this system bolts downstream of the factory catalytic converter, leaving all factory O2 sensor feedback loops untouched.\u003c\/p\u003e\n\n\u003ch3\u003eThe Honda JDM Power Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for high-RPM naturally aspirated VTEC dynamics, this exhaust delivers rapid cylinder evacuation and a refined, deep tone without mid-range torque loss.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50622353080568,"sku":"DS-E38841GPA","price":479.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/cat-back-exhaust-for-honda-civic-si-2007-2011-2-0l-1.jpg?v=1790263468","url":"https:\/\/performancechiptuning.com\/fr\/products\/cat-back-exhaust-for-honda-civic-si-2007-2011-2-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}