I have a mono block amp auot tec mm1400 class D1 amp,and I want to wire it to some L5,Two of them in a f150 pick up.The L5s are 4 ohm but the amp is a 1ohm what do I do??

If your amp can handle 2 ohms, then 2 4ohm speakers in parallel will result in 2 ohms.
4 speakers in parallel will result in 1 ohm impedance. Your Amp and your ears will be happy, but your wallet won't.