{"product_id":"akrapovic-evolution-line-titanium-kawasaki-kx450-s-k4met8-bnta","title":"Akrapovic Evolution Line Titanium Kawasaki KX450 \/ KX450F (2019-2023) – S-K4MET8-BNTA","description":"\u003cp\u003eTwo full horsepower and 1.2 kilograms. Of the motocross systems in this catalogue, this is the one with the largest power gain — 53.8 PS against a standard 51.8 — and it covers five model years across two different names for the same motorcycle.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTitanium complete system, 3.1 kg instead of 4.3 kg\u003c\/li\u003e\n\u003cli\u003e53.8 PS at 9,850 rpm, two horsepower above standard\u003c\/li\u003e\n\u003cli\u003eTorque up from 43.2 to 44.6 Nm\u003c\/li\u003e\n\u003cli\u003eCovers the KX450F of 2019–2020 and the KX450 \/ KX450X of 2021–2023\u003c\/li\u003e\n\u003cli\u003eThe strongest power gain of the motocross systems here\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eKX450F and KX450 are one bike\u003c\/h2\u003e\n\u003cp\u003eKawasaki dropped the F from the name in 2021. The 2019 KX450F and the 2021 KX450 are the same machine under two names, and Akrapovic lists both against this part number. If your bike is a 2019 or 2020 it will be badged KX450F; from 2021 the same bike is a KX450, and the KX450X is the cross-country version.\u003c\/p\u003e\n\u003cp\u003eWe have tagged all three names so the bike is found whichever one you search for.\u003c\/p\u003e\n\u003ch2\u003eTwo horsepower on a 450\u003c\/h2\u003e\n\u003cp\u003eOn a 450 motocrosser two horsepower is a real number rather than a rounding. The peak moves to 9,850 rpm and the torque curve comes up with it — 1.4 Nm more, which on a bike that is short-shifted between ruts is felt more often than the peak is.\u003c\/p\u003e\n\u003cp\u003eThe weight saving of 1.2 kg is the other half. Combined, they are the reason a full system costs what it does against a slip-on.\u003c\/p\u003e\n\u003ch2\u003eNot for the road\u003c\/h2\u003e\n\u003cp\u003eClosed course competition only. No EC or ECE approval and no homologation document. Akrapovic states it plainly and so do we.\u003c\/p\u003e\n\u003ch2\u003eWhat a motocross exhaust has to survive\u003c\/h2\u003e\n\u003cp\u003eA road exhaust lives a sheltered life. A motocross system gets landed on, kicked by a boot at every start, buried in mud, pressure washed while still hot and then left wet in a van. Within a season it will have been hit by roost from the bike in front several thousand times.\u003c\/p\u003e\n\u003cp\u003eThat is why the material matters more here than on a road bike, and why Akrapovic uses a welded bracket rather than a bolted one. There is no fastener to vibrate loose and no joint for grit to work into.\u003c\/p\u003e\n\u003ch2\u003eRepacking a motocross silencer\u003c\/h2\u003e\n\u003cp\u003eThe packing in a motocross silencer degrades far faster than in a road exhaust — the gas pulses are stronger, the temperatures higher and the duty cycle brutal. A silencer that has lost its packing gets louder and can push a bike over a club noise limit that it passed a month earlier.\u003c\/p\u003e\n\u003cp\u003eAkrapovic does not publish a service interval for this system. The practical answer is that a bike ridden every weekend wants checking once a season, and that the first sign is the note going harsh rather than the level going up.\u003c\/p\u003e\n\u003ch2\u003eTwo names, one part number\u003c\/h2\u003e\n\u003cp\u003eBecause Kawasaki renamed the bike in 2021, an owner searching for a KX450F system will not find one listed for 2021 or later, and an owner of a 2019 bike may assume a KX450 part will not fit. Both assumptions are wrong, and the price list settles it: one article, five model years, two badges.\u003c\/p\u003e\n\u003ch2\u003eBuying for an older bike\u003c\/h2\u003e\n\u003cp\u003eA 2019 KX450 is a used machine now, and a titanium system costs a meaningful fraction of what the bike is worth. The argument for it is that the system outlives the motorcycle: titanium does not corrode, the mounts are welded, and it can move to the next bike if that bike is from the same five-year window.\u003c\/p\u003e\n\u003ch2\u003eArticle number\u003c\/h2\u003e\n\u003cp\u003eAkrapovic lists this system as S-K4MET8-BNTA. For the 2024 model year onwards the successor is S-K4MET9-FDHLTA.\u003c\/p\u003e","brand":"Akrapovic","offers":[{"title":"Default Title","offer_id":53631829967114,"sku":"S-K4MET8-BNTA","price":1336000.0,"currency_code":"KRW","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/01_c07c69a0-7471-499f-8a60-451ffd0060e1.png?v=1788618175","url":"https:\/\/inter-pace.com\/en-kr\/products\/akrapovic-evolution-line-titanium-kawasaki-kx450-s-k4met8-bnta","provider":"Inter-Pace","version":"1.0","type":"link"}