I launch in 4hi and hit 115.... The week part in these trucks for the front is the tie rods easy to bend... They make sleeves for them or u can buy after market tie rods that are like a 1/2in thick I think.. Then they have some with hime (sorry about spelling) joints ends not the ball joints... If u go watch the 09 camaro vs 05 silverado thred that's me doing my 4hi and u can see that the wheels toe in on that launch ill be getting the after market tie rods cause their either going to bend or snap if I keep launchn it like that hope that helps