{"product_id":"mustang-gt-rex-ford-15-25-double-step-1-7-8-headers-cats","title":"Mustang GT REX Ford 15-25' - Double Step 1-7\/8 Headers \u0026 Cats","description":"\u003cp data-end=\"253\" data-start=\"165\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cstrong data-end=\"251\" data-start=\"165\"\u003eWhy Choose Equal length stepped headers?\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\u003cp data-end=\"253\" data-start=\"165\"\u003e\u003cspan style=\"font-size: 12pt;\"\u003eTuned-length, stepped headers create amazing sound and power by perfectly timing exhaust pulses for maximum scavenging and velocity. The tuned lengths synchronize pulse waves so each cylinder “pulls” the next one cleanly, while the stepped design maintains high gas speed down low and opens up flow up top — delivering sharper throttle response, stronger torque, and that crisp, harmonically balanced race-car note\u003c\/span\u003e\u003c\/p\u003e\u003cp data-end=\"253\" data-start=\"165\"\u003e\u003cstrong data-end=\"251\" data-start=\"165\"\u003eRamjet Mustang Double-Stepped Headers \u0026amp; High-Flow Cats (1 3\/4\" → 1 7\/8\")\u003c\/strong\u003e\u003c\/p\u003e\u003cp data-end=\"629\" data-start=\"255\"\u003eFor Mustang owners who demand nothing but the best, Ramjet’s \u003cstrong data-end=\"352\" data-start=\"316\"\u003edouble-stepped long tube headers\u003c\/strong\u003e are the ultimate performance solution. This premium system takes our proven equal-length design and pushes it further with \u003cstrong data-end=\"533\" data-start=\"476\"\u003estepped primaries—transitioning from 1 3\/4\" to 1 7\/8\"\u003c\/strong\u003e—delivering maximum flow for high horsepower applications without sacrificing torque down low.\u003c\/p\u003e\u003cp data-end=\"1046\" data-start=\"631\"\u003eCrafted from \u003cstrong data-end=\"667\" data-start=\"644\"\u003e304 stainless steel\u003c\/strong\u003e and engineered with precision, these headers free up serious horsepower and unlock a sharper, more exotic exhaust tone that only a equal-length system can provide. When paired with our high-flow catalytic converters and \u003cstrong data-end=\"921\" data-start=\"893\"\u003eoptional connector pipes\u003c\/strong\u003e, this system bolts up cleanly to the factory cat-back, giving you race-level performance with street-friendly versatility.\u003c\/p\u003e\u003cp data-end=\"1046\" data-start=\"631\"\u003e\u003cimg alt=\"\" height=\"473\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/1-34-headers-7.jpg?v=1767912811\" width=\"564\"\u003e\u003c\/p\u003e\u003cp data-end=\"1067\" data-start=\"1048\"\u003e\u003cstrong data-end=\"1065\" data-start=\"1048\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cul data-end=\"1654\" data-start=\"1068\"\u003e\n\u003cli data-end=\"1174\" data-start=\"1068\"\u003e\n\u003cstrong data-end=\"1116\" data-start=\"1070\"\u003eDouble-Stepped Primaries (1 3\/4\" → 1 7\/8\")\u003c\/strong\u003e – Maximizes velocity while supporting big power builds.\u003c\/li\u003e\n\u003cli data-end=\"1273\" data-start=\"1175\"\u003e\n\u003cstrong data-end=\"1210\" data-start=\"1177\"\u003eEqual-Length Long Tube Design\u003c\/strong\u003e – Perfectly balanced exhaust pulses for superior scavenging.\u003c\/li\u003e\n\u003cli data-end=\"1361\" data-start=\"1274\"\u003e\n\u003cstrong data-end=\"1307\" data-start=\"1276\"\u003ePremium 304 Stainless Steel\u003c\/strong\u003e – Heat-resistant, durable, and built for longevity.\u003c\/li\u003e\n\u003cli data-end=\"1458\" data-start=\"1362\"\u003e\n\u003cstrong data-end=\"1398\" data-start=\"1364\"\u003eHigh-Flow Catalytic Converters\u003c\/strong\u003e – Unleash horsepower while maintaining street compliance.\u003c\/li\u003e\n\u003cli data-end=\"1553\" data-start=\"1459\"\u003e\n\u003cstrong data-end=\"1495\" data-start=\"1461\"\u003eFactory Cat-Back Compatibility\u003c\/strong\u003e – Optional connector pipes ensure a direct bolt-up fit.\u003c\/li\u003e\n\u003cli data-end=\"1654\" data-start=\"1554\"\u003e\n\u003cstrong data-end=\"1579\" data-start=\"1556\"\u003ePremium Performance\u003c\/strong\u003e – Designed for enthusiasts chasing the edge in power, torque, and sound.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp data-end=\"1813\" data-start=\"1656\"\u003eThis is the \u003cstrong data-end=\"1701\" data-start=\"1668\"\u003eflagship Ramjet header system\u003c\/strong\u003e—the choice for serious Mustang builders who want the ultimate combination of performance, quality, and sound\u003c\/p\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/ds-headere.png?v=1767912812\"\u003e\u003c\/p\u003e\u003cp\u003e\u003ciframe allowfullscreen=\"allowfullscreen\" height=\"314\" src=\"\/\/www.youtube.com\/embed\/vjCypJZimfs\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e","brand":"Ramjet","offers":[{"title":"2015-2017 \/ I will be making my own connector pipes to my catback! 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\/ -Yes (+$176)","offer_id":46571736793265,"sku":"1029-20-IW-YE-1","price":1716.0,"currency_code":"AUD","in_stock":false},{"title":"2018-2024 \/ Standard (Connector Pipes Are Needed +$258) \/ -No, I will get my own.","offer_id":46571736826033,"sku":"1029-20-ST-NO-1","price":1798.0,"currency_code":"AUD","in_stock":false},{"title":"2018-2024 \/ Standard (Connector Pipes Are Needed +$258) \/ -Yes (+$176)","offer_id":46571736858801,"sku":"1029-20-ST-YE-1","price":1974.0,"currency_code":"AUD","in_stock":false},{"title":"No Value \/ I will be making my own connector pipes to my catback! \/ -No, I will get my own.","offer_id":47739131363505,"sku":"1029-15-IW-NO-ME","price":1290.0,"currency_code":"AUD","in_stock":true},{"title":"No Value \/ I will be making my own connector pipes to my catback! \/ -Yes (+$176)","offer_id":47739131396273,"sku":"1029-15-IW-YE-ME","price":1290.0,"currency_code":"AUD","in_stock":true},{"title":"No Value \/ Standard (Connector Pipes Are Needed +$258) \/ -No, I will get my own.","offer_id":47739131429041,"sku":"1029-15-ST-NO-ME","price":1290.0,"currency_code":"AUD","in_stock":true},{"title":"No Value \/ Standard (Connector Pipes Are Needed +$258) \/ -Yes (+$176)","offer_id":47739131461809,"sku":"1029-15-ST-YE-ME","price":1290.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0727\/5793\/6305\/files\/MUSTANG_HEADERS_CATS.jpg?v=1784589947","url":"https:\/\/australiaspeed.com.au\/products\/mustang-gt-rex-ford-15-25-double-step-1-7-8-headers-cats","provider":"Australia Speed","version":"1.0","type":"link"}