SPELAB Downpipe Exhaust For BMW E90 E91 E92 E60 E61 Diesel M57 Turbo

Who This Is For

2008-2012 BMW 335d (E90/E91/E92) and 2004-2014 BMW 535d (E60/E61) owners with the 3.0L M57 turbo-diesel engine who want a 3" straight-through downpipe for lower EGTs and sharper turbo response.

Key Features

• Eliminates OE catalytic converter for maximum flow
• +20 HP and +25 lb-ft torque (measured on engineering prototype)
• 100% SUS-304 stainless steel, TIG-welded
• Direct bolt-on to OE turbo or aftermarket turbo with OE exit
• Fits all factory O2 sensors and brackets

Product Specifications

• Engine: BMW M57 3.0L Turbo-Diesel
• Type: 3 Inch Downpipe
• Material: SUS-304 Stainless Steel
• Finish: Mirror Polish
• Configuration: Straight-through (catless; eliminates OE catalytic converter)
• Flange Type: V-Band (with integrated flex section)
• Weight: 2.53 kg (2530 g)

What's Included

• Downpipe
• Mounting hardware

Check Before Choosing

• Engine version: The M57 had multiple revisions. 335d = M57D30TU2 (twin turbo), 535d = M57D30TU or M57D30TU2 depending on year. Send production date to support for confirmation.
• DPF handling: This downpipe removes the catalytic converter but not the DPF. Confirm tune compatibility with support.
• Tune required: Yes — a diesel tune is required to suppress the CEL/DPF codes.
• Street legality: No — off-road / race use only under the Clean Air Act.

Vehicle Fitment

Compatible vehicles: BMW 335d and BMW 535d (2008–2014).

Installation Guide

Pre-Installation Checklist

• Confirm your engine code and model year match the fitment list above
• New gaskets and mounting hardware ready
• 22mm slotted O2 sensor socket + PB Blaster on hand
• a diesel tune to clear CEL

Installation Steps

1. Lift the vehicle and secure it on jack stands
2. Soak the O2 sensors and flange bolts with PB Blaster for 30+ minutes
3. Unplug and remove the O2 sensors with the slotted socket
4. Remove the factory downpipe and discard the old gasket
5. Bolt on the new downpipe with a fresh gasket
6. Reinstall and reconnect the O2 sensors
7. Flash your tune to suppress the check engine light

Installation Notes

• Never reuse the old gasket — it will cause an exhaust leak
• Use a slotted O2 socket, not a wrench — the sensor threads strip easily
• A catless downpipe triggers a CEL until the ECU is tuned
• Expect a stronger raw exhaust smell (normal for catless)

FAQ

Will this lower my EGTs?

Yes — reducing back-pressure lowers exhaust gas temperatures under load, which is a key benefit for towing and hard driving.

Do I need a tune on the 335d?

Yes — a diesel tune is required to suppress the CEL/DPF codes.

What happens to the DPF?

This downpipe removes the catalytic converter but not the DPF. Confirm whether a DPF-compatible tune is required with support.

Is it street-legal?

No — off-road / competition use only under the Clean Air Act.