1″ – 25mm – 33mm – Billet Weld on Filler and Screw Cap


£15.38 (price includes VAT)

Our weld-on billet necks and caps are CNC machined from 6061-T6 Aluminium Alloy providing excellent quality with superior finish and bevelled edges. These necks and caps are perfect use for header and fuel tanks, swirl pots, catch cans, dry sumps and many more applications.

The billet caps are supplied with an intergrated O-Ring.

Specification Metric
Neck Bore 25mm
Neck O.D 33mm
Cap O.D 31mm
Height (Including Cap) 27.2mm
Material 6061-T6 Aluminium Alloy
Finish Polished Aluminium
Brand Pioneer 4×4

Billet Neck And Cap Dimension



  • Please double check you are ordering the correct size and quantity prior to checkout.

United Kingdom

  • Royal Mail 24 Tracked Small Parcel £4.30
  • Royal Mail 48 Tracked Small Parcel £3.70
  • Royal Mail 24 Tracked Large Parcel £6.10
  • Royal Mail 48 Tracked Large Parcel £4.90
  • DHL Express £9.99

Delivered within an estimated 3 working days once dispatched


  • Royal Mail Tracked From £14.99
  • DHL Express From £19.99

Delivered within an estimated 7-10 working days once dispatched

Rest of the World

  • Royal Mail Starting from From £24.99
  • DHL Express From £24.99

Delivered within an estimated 10 working days once dispatched. Import duties, taxes, and other charges are not included in the price of the product or the cost of shipping. These fees are the sole responsibility of the buyer. Please check with the customs office in your country regarding your fees before making a purchase.


All our brake line kits are made to order and are usually made and dispatched within 5 days of ordering. If you require your kit sooner, please do let us know. 

If there is a delay with your order, you will be notified as soon as possible.

Some of our tracked delivery options require a signature. If there is no one available to sign for the delivery, a card will be left for you to arrange delivery at a suitable time.

If a delivery has not been attempted within the timescales stated, please contact us so we can investigate it for you.