Injector Spill Rail / Leak-Off Kit — Land Rover 300Tdi Replaces OE Numbers: MJN100910 · ERR3306 · ERR3306R · NRC9770 · NRC9771
DLO-001-BK
Pairs well with
Premium PTFE-lined, stainless steel braided injector spill rail and leak-off kit for the Land Rover 300Tdi 1994-1998, handmade in the UK as a direct replacement for the original perishable diesel leak-off pipes.
- Injector spill rail / leak-off pipe. Replaces OE: MJN100910
- Supersedes: ERR3306 / ERR3306R
- Also replaces: NRC9770 / NRC9771
Designed as a direct replacement for the original diesel leak-off pipes on the 300Tdi, this kit returns excess fuel from the tops of the injectors back to the pump — and puts an end to the perished, cracked rubber that lets air into the fuel system.
Unlike the original rubber assembly, every Pioneer 4x4 spill rail kit is built entirely from stainless steel — PTFE-lined braided hose with a protective coloured PVC outer cover and stainless steel fittings throughout — for maximum durability and corrosion resistance in harsh road, towing, expedition and off-road environments.
Why upgrade?
The original leak-off pipes are a known weak point on the 300Tdi. As the rubber ages it hardens and cracks, drawing air into the fuel line and causing hard starting, rough running and fuel weeping over a hot engine. A PTFE-lined, full stainless steel spill rail removes that failure point for good — no perishing, no splitting, no air leaks.
In the kit
- PTFE-lined stainless steel braided spill rail / leak-off assembly
- Stainless steel banjo bolts and copper washers for all four injectors — single bolt for injector No.1, double banjo bolts for No.2, No.3 and No.4
- Two fuel-line compression fittings (nut & olive) — one to suit the original Land Rover fuel lines, one to suit the Pioneer 4x4 fuel line kit
- Everything needed to fit, straight out of the box
Need something bespoke?
We make custom lengths, fittings and configurations to order. If you need something specific for your build, get in touch with your requirements before ordering and we'll sort it.
Built to outlast the rubber
- PTFE inner liner — resistant to heat, pressure, moisture and corrosion
- Full stainless steel construction — braid, fittings, ferrules, nut, olive and banjo bolts throughout
- Protective PVC covering — guards against abrasion, dirt and harsh environments
- Direct OE replacement — fits in place of MJN100910 / ERR3306 with no modification
- No more perished pipes — won't crack, split or draw air like the original rubber
- Complete kit — everything needed to fit included as standard
- Handmade in Devon — machined and assembled in-house on our own equipment
The numbers
- Line inner material: PTFE
- Line outer material: Stainless steel (303/304) with protective PVC cover
- Fittings material: Stainless steel (303/304)
- Temperature range: -70°C to 260°C (-94°F to 500°F)
- Inside diameter: 3.5mm (0.138")
- Outside diameter: 7.5mm (0.295")
- Maximum working pressure: 290 Bar (4206 PSI)
- Burst pressure: 870 Bar (12618 PSI)
- Minimum bend radius: 38mm (1.496")
Fitting
Everything you need is in the box. Before you start, read our full step-by-step 300Tdi spill rail fitting guide — it covers injector numbering, which banjo bolt goes where, the copper washer sequence, the two fuel-line compression fittings and re-using the pump's non-return bolt.
If you're unsure on fitment, get in touch before ordering.
Handmade in the UK, backed for life
Every Pioneer 4x4 stainless steel kit is made to order in the UK and covered by a no-quibble lifetime warranty — complete confidence in its quality, durability and long-term performance.
We ship from our workshop in Devon and post worldwide. All orders are fully tracked.
Dispatch times
In-stock items are dispatched within [1–2] working days. Our Land Rover full brake system kits are hand made to suit your exact vehicle and setup, so please allow 7–10 working days before dispatch on those.
Where we ship
UK, Europe, USA & Canada, Australia & New Zealand, and the rest of the world. UK smaller items go on Royal Mail Tracked; larger boxes and all international orders go by tracked courier.
Shipping costs — calculated at checkout by weight and size. Starting prices:
- UK — from £4.99 (Royal Mail Tracked) · larger items £14.99 courier
- Europe — from £18.00
- USA & Canada — from £26.99
- Australia & New Zealand — from £28.99
- Rest of World — from £28.99
All prices include VAT. Any import duties or taxes charged by the destination country are the customer's responsibility.
