Side by side of stock 4th gen f-body k-member vs the UMI Road Race k-member. I also weighed both for those curious individuals. https://www.umiperformance.com/home/p... Edit: I mistakenly had the scales set to kilograms instead of pounds, hence my confusion. So here is the conversion to pounds Stock k-member: 21kg = 46.3lbs UMI Road Race k-member 14.5kg = 32lbs Weight reduction of 14.3lbs