i didnt notice any difference, but my 250 doesnt tend to twist leaf springs. even the old worn out ones. best i can do is chirp 2nd with an rv kit in the th350. it would chirp with the bars on there too.

i think if you've got a 400 or better, and have enough traction already to twist a spring and create wheel hop, they couldnt hurt to put'm back on (after you paint them yellow )