I have some gauge kits that anyone on here can have at less than cost price. Better they get used than sitting in storage. They are electric and I had intended for them to be permanently installed, however the sender units dont last and I therefore pulled them from sale. The sender would be fine if not used permanently. The gauge has proved reliable, its only the sender that has a limited lifespan. The gauge measures to 150psi. You get the "T" piece, sender and gauge. £20 + postage to clear. Have sold about a dozen of these previously via ebay and dispatched all over europe. Had no complaints. was selling for just shy of £50. Had one in my vitesse pi for about three years[ hence why i know about the sender longevity problem] Andy.