{"product_id":"speed-engineering-1997-2004-c5-corvette-1-7-8-longtube-headers-x-pipe-full-kit-ls1-ls6-engines","title":"Speed Engineering 1-7\/8\" Longtube Headers \u0026 X-Pipe Full Kit — 1997–2004 Chevrolet C5 Corvette | LS1\/LS6 5.7L | 25-1034","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe factory exhaust manifolds on your C5 Corvette are leaving power on the table. This complete full kit pairs Speed Engineering's 1-7\/8\" longtube headers with a 3\" off-road X-pipe that connects directly to the existing axle-back location — replacing the restrictive factory exhaust manifolds and mid-pipes with a free-flowing stainless system engineered for maximum horsepower gains, aggressive exhaust tone, and great ground clearance for lowered builds. Dyno proven to deliver over 25 rear-wheel horsepower over stock. Covers both the standard C5 (LS1) and the C5 Z06 (LS6).\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eBuilt from 304 natural stainless steel with mandrel-bent primary tubes, merge spikes, CNC-machined flanges, and full TIG-welded construction.\u003c\/p\u003e\n\u003cblockquote class=\"ml-2 border-l-4 border-[hsl(var(--border-300)\/0.1)] pl-4 text-text-300\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e⚠️ \u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRear downstream O₂ sensors are not used\u003c\/strong\u003e — a check engine light for catalyst efficiency will appear and must be disabled via PCM tuning\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eO₂ extensions vary by year — select your year at checkout:\u003c\/strong\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1997–2003: Flat O₂ extensions\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2004: Square O₂ extensions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRequires 2001–2004 oil dipstick tube\u003c\/strong\u003e for proper installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/blockquote\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1 Pair of 1-7\/8\" Stainless Longtube Headers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1 Three-inch Off-Road X-Pipe \/ Connection Pipe\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1 Set of Zinc-Coated Header Bolts (upgrade to stainless ARP bolts available at checkout)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2 MLS Exhaust Gaskets\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eO₂ Extension Harnesses (flat or square — select your year at checkout)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cblockquote class=\"ml-2 border-l-4 border-[hsl(var(--border-300)\/0.1)] pl-4 text-text-300\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eOptional: Speed Engineering LS Spark Plug Wires and Plug Wire Fire Sleeves can be added at the time of purchase.\u003c\/p\u003e\n\u003c\/blockquote\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFull 1-7\/8\" Primary Tubes with Merge Spike\u003c\/strong\u003e — Maximum flow from cylinder head to collector for aggressive LS1\/LS6 performance\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e3\" Collector\u003c\/strong\u003e — Optimized for strong low-to-mid RPM torque\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMandrel Bent Tubing\u003c\/strong\u003e — Consistent tube diameter through every bend; no crimping, no restriction\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCNC Machined Flanges\u003c\/strong\u003e — Precision fit at the head and collector for a leak-free seal\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003e304 Natural Stainless Steel Construction\u003c\/strong\u003e — Corrosion resistant, heat tolerant, and built to last\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eImproved Ground Clearance Over Competitors\u003c\/strong\u003e — Engineered for excellent clearance on lowered C5 builds\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eLongtube Header Design\u003c\/strong\u003e — Maximum scavenging efficiency vs. shorty or mid-length headers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003eStandard Graphite Manifold Gaskets Included\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDyno Proven\u003c\/strong\u003e — 25+ RWHP gain on C5 Corvette applications\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003eCompatible with 5.7L LS1 and LS6 Engines\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eVehicle Applications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eChevrolet C5 Corvette — LS1 5.7L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1997 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1998 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1999 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2000 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2001 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2002 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2003 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2004 Chevrolet Corvette C5 (RWD) — 5.7L LS1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eChevrolet C5 Corvette Z06 — LS6 5.7L\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2001 Chevrolet Corvette C5 Z06 (RWD) — 5.7L LS6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2002 Chevrolet Corvette C5 Z06 (RWD) — 5.7L LS6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2003 Chevrolet Corvette C5 Z06 (RWD) — 5.7L LS6\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2004 Chevrolet Corvette C5 Z06 (RWD) — 5.7L LS6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFrequently Asked Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: Which O₂ extensions do I need?\u003c\/strong\u003e O₂ extension harnesses vary by model year. 1997–2003 C5 Corvettes use flat O₂ extensions. 2004 C5 Corvettes use square O₂ extensions. Select your model year at checkout to ensure the correct harnesses are included.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: What is the oil dipstick tube requirement?\u003c\/strong\u003e These headers require the use of the 2001–2004 style oil dipstick tube for proper installation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: Will I get a check engine light after installing this kit?\u003c\/strong\u003e Yes. The rear downstream O₂ sensors are not used with this system, which will trigger a catalyst efficiency code. This must be resolved through PCM tuning and cannot be cleared by simply resetting the ECU.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: Does this kit fit the C5 Z06?\u003c\/strong\u003e Yes. This kit fits both the standard C5 Corvette (LS1) and the C5 Z06 (LS6) from 2001–2004.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: Are these headers good for lowered C5 builds?\u003c\/strong\u003e Yes. Speed Engineering engineered these headers with improved ground clearance over competitors, making them an excellent choice for lowered C5 builds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: What is included in this kit?\u003c\/strong\u003e The kit includes a pair of 1-7\/8\" stainless longtube headers, a 3\" off-road X-pipe, two MLS exhaust gaskets, zinc-coated header bolts, and O₂ extension harnesses. An upgrade to stainless ARP bolts is available at checkout. Speed Engineering LS spark plug wires and plug wire fire sleeves can also be added at the time of purchase.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: How much horsepower does this kit add?\u003c\/strong\u003e Speed Engineering's 1-7\/8\" longtube headers are dyno proven to add over 25 rear-wheel horsepower on C5 Corvette LS1 and LS6 applications compared to stock exhaust manifolds.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: What material are these headers made from?\u003c\/strong\u003e 304 natural stainless steel with full TIG-welded construction, CNC-machined flanges, and merge spikes.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eQ: Are these headers street legal?\u003c\/strong\u003e No. These are race-only headers intended for closed-course competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).\u003c\/p\u003e","brand":"Speed Engineering","offers":[{"title":"1997-2003 (Flat o2 Extensions)","offer_id":42800683876400,"sku":null,"price":624.95,"currency_code":"USD","in_stock":true},{"title":"2004 (Square o2 Extensions)","offer_id":42800683909168,"sku":null,"price":624.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0586\/9548\/3440\/files\/C5FullKitFlatExtension97-03.jpg?v=1772039352","url":"https:\/\/berryperformancesales.com\/products\/speed-engineering-1997-2004-c5-corvette-1-7-8-longtube-headers-x-pipe-full-kit-ls1-ls6-engines","provider":"Berry Performance Sales","version":"1.0","type":"link"}