hey guys i had a question. whats the difference in the stock fuel rails that come on B series motors, the one on my LS is like a much smaller one in diameter im sure u know what im talking about, and the b16 one is like made of of aluminum and more square shaped. why the change? is one better than the other? thanks just wondering becuase i have both sitting around and wasn't sure if one would be better to use than the other.

 

it is the design. not all b series fuel rail are the same. like u said and even type r fuel rail is different. if u are running n/a stock fuel rails will be fine. what motor are u running

 

b18b1. im going to run stock rail i was just curious cause i had ab16 one laying around.