LIUWEIRACING Silicone Turbo Inlet Pipe — B58 M340i / M440i / Z4 M40i
by LIUWEIRACING
Key Features
- High-temperature resistant silicone construction outlasts OEM rubber inlet hose
- Smooth interior bore reduces airflow restriction for sharper turbo response
- Direct OEM airbox retention — no cutting, fabricating, or extra hardware needed
- Fits 11 B58 3.0L platforms: G20 M340i, G22/G23 M440i, G29 Z4 M40i, G42 M240i, A90 Supra
- Drop-in clamp fitment makes installation achievable with basic hand tools
- Improves mid-range throttle response and power delivery on forced-induction B58 engines
Product Details
- Brand
- LIUWEIRACING
- Part #
- ICP021-BK
- Category
- Turbo Inlet Pipes
- ASIN
- B0GKMX5V3R
Check if it fits your BMW
LIUWEIRACING Silicone Turbo Inlet Pipe — B58 M340i / M440i / Z4 M40i — Overview
The factory turbo inlet pipe on the B58 is a known weak point — the OEM rubber hose uses a corrugated interior that creates measurable turbulence and restriction before air even reaches the turbo inlet. LIUWEIRACING's silicone replacement smooths that bore out, allowing a more laminar, unrestricted airflow path directly into the turbocharger. The result is a crisper throttle tip-in and a more immediate mid-range surge that B58 owners notice on the first pull.
Built from high-temperature silicone rated to handle the repeated heat cycles of a turbocharged engine, this inlet pipe is engineered to outlast the factory unit without cracking, collapsing, or softening over time. Unlike cheap universal silicone, the wall thickness and compound here are specific to forced-induction under-hood temperatures — a detail that matters when the engine bay of an M340i or Z4 M40i runs hot.
Installation is a genuine direct swap. This pipe is designed to work with the stock airbox in place, so there's no need to source an aftermarket intake system, modify any mounting points, or source additional hardware. Clamp off the OEM hose, clamp on the LIUWEIRACING pipe, and you're done — a realistic 20-30 minute job for anyone comfortable under a hood.
Fitment spans the full modern B58 3.0L lineup: BMW G20 M340i and M340i xDrive, G21 M340i xDrive Touring, G22/G23 M440i in coupe and convertible, G26 M440i xDrive Gran Coupe, G29 Z4 M40i, G42 M240i xDrive, and the Toyota GR Supra A90 MKV. If you're running a B58 and want a low-effort, high-reward first modification, this is the place to start.
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