Automotive tattoo would be cool. Don't like the roses or heart but could tweak the design nicely.
Hot Rod Piston Banner Traditional Tattoo Style Art by agorables
skull with piston under green light tattoo by kaifa teschio con pistone in luce verde tatuaggio realizzato da Kaifa
Skull and Pistons - Tattoos Vectors
skull and piston tattoo - Google Search
Heart Gas Engine Piston Male Tattoo Designs
What you do not know about Mechanic tattoos | AMBCTGJ