Note! Pre-order item. Deliveries start in February 2027.
The GRAIL Downpipe is designed for the BMW 335i N54 model (E9x, 2006–2010). It replaces the original catalytic converter and brings out the full acoustic potential of the N54 twin-turbo straight-six engine. Made from L304 steel, the downpipe is type-approved in accordance with the UN ECE R103 standard and does not require separate registration when assembled in accordance with the conditions of approval. It can be combined with the original exhaust system, a GRAIL exhaust system, or other ECE type-approved exhaust systems.
What is replaced in the vehicle?
The key is the connection point: where does the original system end, and where does the replacement part begin?
Remain unchanged
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Engine control and programming
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In-vehicle diagnostics (OBD)
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Exhaust system from the middle section backwards
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Original exhaust system mounting points
Replaced
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Original catalytic converters
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L304 stainless steel downpipes
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Engine sound characteristics across the entire RPM range
Will the system fit your vehicle?
Suitable vehicles
The GRAIL Downpipe is suitable for the BMW 335i model equipped with an N54 engine in the following body styles:
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E90 (sedan)
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E91 (Touring)
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E92 (Coupe)
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E93 (convertible)
Model years 2006–2010. Compatible with both rear-wheel-drive and xDrive all-wheel-drive models.
Compatibility limitations
The product is intended for all E9x body styles equipped with an N54 engine, whether rear-wheel-drive or all-wheel-drive. It can be combined with the original exhaust system or a GRAIL exhaust system.
Technical specifications
Vehicle reference number: SP-201680
Make: BMW
Model: BMW 335i N54 (E9x)
Body styles: Sedan, Coupe, convertible and Touring · E90 / E91 / E92 / E93
Model years: 2006–2006
Engine: N54
Power: 225 kW / 306 hp
Displacement: 2,979 cm³
Downpipe – technical specifications
Quality standard: ISO 9001
Material: L304
Approval: ECE / UN R103
Registration, TÜV inspection and emissions
The GRAIL Downpipe designed for the BMW 335i N54 model (E9x, 2006–2010) is type-approved as an exhaust aftertreatment system in accordance with the UN ECE R103 standard.
The modification does not need to be registered separately when the product is used in accordance with the conditions of approval together with the original exhaust system, a GRAIL exhaust system, or another ECE type-approved exhaust system.