{"product_id":"fmf-4-stroke-header-pipes-1","title":"FMF 4 Stroke - Header Pipes","description":"\u003cp\u003eMEGABOMB HEADER:\u003cbr\u003e\nThe science behind the MegaBomb header may be FMF's greatest engineering accomplishment to date. You can bolt on a Megabomb with an existing FMF Racing muffler for as much as a 3hp boost, plus the Megabomb actually reduces noises levels by as much as 1.5dB. The Megabomb technology is revolved to produce more low end to mid range gains as well as broadening out the mid to top end power gains over stock. The Megabomb is best used for Motocross\/Supercross and GNCC style trails. Used by Factory Teams, the Megabomb is the next level technology you can have today.\u003c\/p\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eProduces long header torque and short header over-rev\u003c\/li\u003e\n\t\u003cli\u003eReduces sound output as much as 1.5dB\u003c\/li\u003e\n\t\u003cli\u003eIncreases output from stock motor as much as 3hp\u003c\/li\u003e\n\t\u003cli\u003eMade from premium American TiMetal material\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003ePOWERBOMB HEADER:\u003cbr\u003e\nThe redesigned PowerBomb is a four-stroke header that incorporates FMF’s patented PowerBomb module at a precise location in the initial stage of the header. By positioning this “Bomb” at a key point in the system, increased performance and flow is achieved through the expansion and contraction of exhaust sonics through the system. Result is a flow increase of nearly 10%! The outer chamber in the Powerbomb allows the air to expand, cool and ramp back up at a higher velocity. Additionally, the PowerBomb is a “pre-muffler” of sorts which helps to lower the bikes sound output by providing more sound absorbing surface area for the sound medium (exhaust gases). On some models, you can choose between a moto or supercross version. The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range. \u003c\/p\u003e\n\n\u003cp\u003e \u003c\/p\u003e\n\n\u003cp\u003eWe recommend all motorcycle parts are fitted and tested by qualified professionals.\u003cbr\u003e\nIf you are unsure about the part choice for your bike, please contact us before purchase.\u003c\/p\u003e\n","brand":"FMF Racing","offers":[{"title":"I Powerbomb S\/S XR650R 00-05 Header FMF","offer_id":39795604783170,"sku":"FMF-040021","price":629.95,"currency_code":"NZD","in_stock":false},{"title":"Powerbomb S\/S DRZ400 00-07-DRZ400S 00-22-DRZ400SM 05-21 Header FMF","offer_id":39795604815938,"sku":"FMF-040038","price":629.0,"currency_code":"NZD","in_stock":true},{"title":"I Powerbomb S\/S YZ250F 01-06-WR250F 01-13 Header FMF","offer_id":42430936580162,"sku":"FMF-040073","price":519.95,"currency_code":"NZD","in_stock":false},{"title":"Powerbomb S\/S CRF450R 04-08- CRF450X 05-09\/12-17 Header 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