Its big but it works dead on! and it doesnt look so bad under the hood. And my dog was trying to eat it, lol. Shes so damn nosy. But i Have had it on the rail for a thousand miles now, np. Just got back from vaca, no problems the whole trip there around and back. Funny watching it starting in 30* temp, was a psi or 2 low then on warm up was fine again. Anyway Mine is also large in part I guess because the sender and guage I only paid 45 bucks for. And might I add, a bad ass gauge too. lol. Everyone loves my set up- I will have to get pics for you guys.