{"product_id":"rlv-b91l-exhaust-silencer-1-1-8-spec-stock-class-legal","title":"RLV B91L Exhaust Silencer - 1 1\/8\" Spec - Stock Class Legal","description":"\u003cp\u003eMaximizing exhaust velocity while maintaining strict decibel compliance is non-negotiable for 196cc clone stock class dominance, which is why our karting store secures top-tier components like the RLV B91L silencer. Engineered specifically for 1 1\/8-inch headers, this closeout exhaust silencer prevents the restrictive backpressure that kills top-end RPMs in GX200 and clone engines. By smoothing out exhaust pulses, the B91L ensures your engine breathes efficiently from the drop of the green flag to the final lap.\u003c\/p\u003e\u003ch2\u003eTech-Legal Performance: As Critical as Master Cylinder Brake Parts\u003c\/h2\u003e\u003cp\u003eWhen you are tuning for the podium, every component in your exhaust system must work in harmony to preserve the engine's power curve. The RLV B91L achieves this through precision-baffled internals that disrupt sound waves without choking exhaust gas flow. This means you pass tech inspection without sacrificing the critical horsepower needed to pull away on the straights. Just as you wouldn't compromise on high-performance master cylinder brake parts for late braking, you shouldn't compromise on exhaust efficiency. This 1 1\/8-inch silencer slips directly onto standard stock headers, eliminating the need for flow-disrupting adapters and keeping your exhaust tract as smooth as possible.\u003c\/p\u003e\u003ch2\u003eSeamless Integration with Catch Cans and Steering Components\u003c\/h2\u003e\u003cp\u003eA well-organized kart chassis is a fast kart chassis. Securing your exhaust properly with heavy-duty braces and clamps ensures stable engine temperatures and prevents vibration-induced failures. While you are routing your overflow lines for catch cans or dialing in your front-end steering components, integrating the B91L silencer streamlines your entire rear-engine layout. Its compact footprint keeps the exhaust tucked safely inboard, reducing the risk of damage during tight wheel-to-wheel racing.\u003c\/p\u003e\u003cp\u003eWhether you are executing a complete go kart steering wheel upgrade or fine-tuning your engine package, securing this closeout RLV silencer is a strategic move. It guarantees your 196cc clone remains compliant, competitive, and sounding exactly like a race-winning machine should.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 1\/8-Inch Slip-On Fitment:\u003c\/strong\u003e Mates perfectly with standard stock class headers without requiring restrictive adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptimized Flow Dynamics:\u003c\/strong\u003e Internal baffling reduces decibels while preserving critical exhaust gas velocity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStock Class Compliant:\u003c\/strong\u003e Engineered to meet strict noise regulations in 196cc clone and GX200 racing series.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Footprint:\u003c\/strong\u003e Keeps the exhaust system tucked tight to the chassis, preventing damage during close racing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Resistant:\u003c\/strong\u003e Designed to clip securely to standard exhaust braces for long-lasting durability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal Stability:\u003c\/strong\u003e Promotes even exhaust dispersion to help maintain consistent engine operating temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCloseout Value:\u003c\/strong\u003e Premium RLV manufacturing at a fraction of the cost, maximizing your racing budget.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the RLV B91L silencer compatible with all clone headers?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This silencer is specifically engineered for 1 1\/8-inch headers. It provides a direct slip-on fit for standard stock class headers, eliminating the need for restrictive adapters that can hurt your engine's performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this silencer help me pass tech inspection?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes. The B91L is designed for stock class compliance. Its precision-baffled internals are engineered to disrupt sound waves and meet strict decibel regulations without creating the backpressure that typically chokes exhaust flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How should I secure the silencer to my kart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e To prevent vibration-induced failures and ensure longevity, the silencer should be clipped securely to a standard exhaust brace. Proper mounting is essential for maintaining consistent engine temperatures and protecting the exhaust system during wheel-to-wheel racing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this silencer affect top-end RPMs?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Unlike restrictive mufflers, the B91L is designed to maximize exhaust velocity. By smoothing out exhaust pulses, it helps your 196cc clone or GX200 engine breathe efficiently, which is critical for maintaining power on the straights.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/exf5007-rlv-clone-thick-flange-header-959-id-exf5007\"\u003eRLV EXF5007 Thick Flange Clone Header with 0.959 Inch ID for Power Gains\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/5434-rlv-thick-flange-clone-header-j-style-5434\"\u003eRLV Thick Flange J-Style Clone Header for Robust GX200 Performance\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/5435-rlv-clone-gx200-wide-power-band-j-style-header-5435\"\u003eRLV Wide Power Band J-Style Header for GX200 Clone Engines with Hardware\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/bwk5905-rear-bumper-mount-kit-bwk5905\"\u003eRLV Rear Bumper Mount Kit - CIK-Style for Secure Kart Installation\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/4117-rlv-b-91-mini-muffler-this-fits-weiner-type-pipe-only-4117mm\"\u003eRLV B-91 Mini Muffler for Weiner-Type Clone Pipes\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":52379647902015,"sku":"WKAS118","price":60.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/6843\/4239\/files\/silencers-wkas118-silencer-stock-class-1-1-8-model-b91l-closeout-wkas118.jpg?v=1773222749","url":"https:\/\/metro-merch-3.myshopify.com\/products\/rlv-b91l-exhaust-silencer-1-1-8-spec-stock-class-legal","provider":"Metro Merch","version":"1.0","type":"link"}