The Silman Premium Exhaust C-Bend Pipe (LPA21 Specification) is a high-performance, precision-engineered front header pipe designed exclusively for Royal Enfield’s next-generation J-Series 350cc SOHC engine platform. It features an intelligent Universal Dual-Sensor and Single-Sensor adaptive design to tackle a major headache for riders and e-commerce sellers: compatibility transitions across different emission manufacturing years.
Whether your motorcycle is an early J-Series model featuring a single Oxygen () sensor port near the engine flange or a late-model OBD-2 / BS6 Phase 2 compliant bike requiring dual sensor inputs (including the secondary sensor lower down the pipe), this single header pipe accommodates both configurations flawlessly. For single-sensor setups, the secondary port can simply be plugged with a standard threaded dummy bolt, making it a highly versatile, future-proof replacement component.
Key Features:
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Universal Sensor Adaptive Engineering: Built with pre-machined, high-integrity threaded ports to support both single-sensor and dual-sensor electronic fuel injection (EFI) management configurations.
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Flawless J-Series J-Bend Architecture: Micro-bent to mirror original factory clearances exactly, preventing frame contact and ensuring zero interference with the main chassis structure or footpeg controls.
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Premium Heavy-Gauge Construction: Forged from thick, structural-grade metal alloy designed to withstand relentless high-temperature exhaust gas cycles without scaling, pitting, or warping.
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Optimized Internal Exhaust Scavenging: Smooth internal mandrel bends drastically minimize exhaust backpressure, ensuring a linear power curve, crisp throttle response, and a deeper base thump.
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Anti-Corrosive Resilient Finish: Finished with a heavy-duty, industrial-grade outer protective plating that resists road-salt pitting, muddy water stains, and premature thermal yellowing or blueing.
Technical Specifications:
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Brand: Silman
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Component: Front Exhaust C-Bend Header Pipe
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Model Designation: LPA21 Series
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Compatibility Type: Dual-Sensor & Single-Sensor Universal Adaptive Layout
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Engine Platform: Next-Gen J-Series 350cc SOHC
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Material: Heavy-Duty High-Tensile Structural Steel Alloy
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Country of Origin: India
Motorcycle Compatibility
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Royal Enfield Classic 350 Reborn (All J-Series Models, 2021–Present | Single & Dual Sensor Variants)
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Royal Enfield New Bullet 350 / Bullet Battalion (Next-Gen J-Series Models, 2023–Present)












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