Pioneer 4x4Land Rover 300Tdi 1994-1998

Injector Spill Rail / Leak-Off Kit

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.

Pre-order

Now in production — dispatching within 14 days

This kit is available to pre-order. Production has started and units are expected to be ready to dispatch within 14 working days of order. Place your order now to reserve yours from the first batch and we'll notify you as soon as it ships.

Replaces OE numbers

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.

The hero feature

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.

What's included

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

Custom work

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.

Key features

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

Specifications

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 & safety

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.

Lifetime warranty

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.

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