This part is harder than the one with the stock. It should be replaced to make the suspension stable. It last longer than the stock. It won't be easily break out. It fit perfectly on TA05 and TB02, but if you decide to use this part with TA05ifs you have to change rear upright, c-hub and front knuckle to TA05parts to fit it. Anyway i recommend this part to TA05 users and TB03 users.