NORIFUMI Slipon Whoops Exhaust (Stainless Steel + Carbon) — Royal Enfield Himalayan 450 / Guerrilla 450 — Long

Give your Himalayan 450 or Guerrilla 450 a genuine upgrade over the stock can with Norifumi's Whoops slip-on — a bolt-on muffler built in high-grade stainless steel with a carbon fibre finish for a lighter, sportier look without touching the stock header pipe.

The extended "Long" body optimizes exhaust flow for a fuller, deeper note and a noticeable bump in low-to-mid range throttle response, while keeping the balanced, adventure-ready tone that suits both these bikes' rugged character. Because it's a slip-on — replacing only the end can, not the full header-to-tailpipe system — installation is straightforward and doesn't require the fuelling and mapping changes a full system exhaust would need.

Since the Himalayan 450 and Guerrilla 450 share Royal Enfield's Sherpa 450 platform and engine, one exhaust fits both models.

⚠️ Before you order: this is the slip-on (muffler-only) version, not a full system — confirm with the customer which they actually want, since some riders assume "exhaust" means the whole system. This listing is the Long body length; a Short version also exists, and both come in plain Stainless Steel or Stainless Steel + Carbon finish — four variants total on this platform. Make sure the customer picks the right length and finish before checkout.

A note on sound: unlike some of Norifumi's Kompetisi-tier full systems, this slip-on listing doesn't mention a removable DB killer. If a customer asks about noise levels or PUC/RTO compliance, don't promise adjustability — confirm with the supplier whether this can ships with one before answering.

Key details

• Brand: Norifumi
• Fits: Royal Enfield Himalayan 450 and Guerrilla 450 (shared Sherpa 450 platform)
• Type: Slip-on (muffler/end-can replacement only — stock header retained)
• Length: Long (Short also available)
• Construction: High-grade stainless steel body
• Finish: Carbon fibre outer sleeve (plain stainless finish also available)
• Fitment: Direct bolt-on; professional installation recommended
• Sound: Deep, adventure-tone note — confirm DB killer availability with supplier before advising customers on adjustability