I am currently using the P72 with knock sensor attached.

My friend has an extra P28 that use to power his B18C R motor, he told me to run it because it will run stronger....

Should I try it out??

The only difference is no knock sensor right?? the knock sensor on the P72 will save me just in case.

So is it worth it??

 

if your running a b18c motor with the dual runners keep the p72. The p28 will not make the second runners function and will affect performance unless u get the skunk2 manifold.