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RB BMW N54 High-Flow Turbo Oil Drain/Return Lines RB04 Fits E82/E88 135i, E90/E91/E92/E93 335i/335is, E60/E61 535i, E89 Z4 35i/35is, E71 X6 35i, F01/F02 740i

RB BMW N54 High-Flow Turbo Oil Drain/Return Lines RB04 Fits E82/E88 135i, E90/E91/E92/E93 335i/335is, E60/E61 535i, E89 Z4 35i/35is, E71 X6 35i, F01/F02 740i

£205.20
£228.00 £205.20
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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

RB04 Turbo Oil Return Hoses for BMW N54 - High Capacity Drainback Kit

Keep your N54 twin turbo running clean and reliable with RB04 high-capacity turbo oil return hoses. This direct-fit drainback solution provides a straight, large-bore path from the CHRA to the sump, helping prevent oil pooling, blue smoke at idle, smoking on overrun and turbo seal overload. Ideal for fast-road and tuned builds as well as fresh stock turbos, these return pipes are a proven upgrade for the BMW N54 straight six.

Why this upgrade makes a difference

Ageing factory return pipes can pinch, collapse internally or use varying, undersized IDs that slow gravity drain. That restriction raises oil level in the core and can lead to smoke, leaks and reduced turbo life. RB04 replaces the restrictive routing with a consistent, generous inner diameter and a smooth, direct path for stable drainback under heat and load.

  • Large-bore return path helps the turbo centre housing clear oil rapidly
  • Straight, anti-kink routing improves drain performance compared with ageing OE pipes
  • Helps reduce smoking after hot idle and hard pulls by preventing oil backup
  • Great reliability upgrade for mapped, hybrid and stock-frame N54 setups
  • Fits stock-footprint upgrade turbos such as RB, Pure, VTT and Hexon, plus factory units
  • Plug-and-play fitment for N54 twin turbo cars listed below

Vehicle fitment - BMW N54 applications

  • E82 and E88 135i
  • E90, E91, E92, E93 335i, 335ix, 335is
  • E60 and E61 LCI 535i, 535ix
  • E89 Z4 sDrive35i and sDrive35is
  • E71 X6 xDrive35i
  • F01 740i and F02 740Li

Part number

RB04

What our customers say

We have installed this RB04 drainback kit on multiple N54 builds in-house and run it on our own cars. Feedback is consistently positive, with owners reporting cleaner exhausts, less smoke after heat soak and greater confidence in long-term turbocharger health.

Fitting and support

Professional installation recommended. MJ Modifications in Warwickshire can supply and fit this kit. For a fitting quote, availability and lead times, email info@mjmodifications.co.uk.

Compatibility check before dispatch

To ensure the right parts are sent, provide your UK registration or the last 7 digits of your VIN at checkout so we can verify fitment for your specific chassis and engine variant.

Manufacturer

RB

Warranty

The manufacturer does not offer a warranty on this item.

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