Same reason I bought one, my stock one was vibrating bad and I got an aluminum one used in great shape for $100. No more vibrations. I noticed nothing performance wise but the aluminum one is about 5 pounds lighter.For me the only real gain is I lost a ton of vibration issues (mainly at highways speeds) and its 9lb's lighter!
didn't notice anything else though...
oh I see it needed to be rebalancedI put one on both my stangs,91-95. I had a bad vibration problem on my 95 and had it looked at but nothing was found. They installed new HD U-joints and it was still there. After I got a good deal on a used one from a buddy I installed it and vibration gone. Turned out the stock shaft was bent, don't know how. They do help with quicker rev's. Put and aluminum flywheel also like I did and you'll see what I mean.:yes
well hopefuly i will be safe then, im looking to build about 500 to the flywheel. but im going to have a good suspension setup also. im sure i will break the stock axles before breaking a drivehsaft loli've made 403 to the wheels in my turbo car and it had a frpp aluminum ds no issues but switched to a t56 so required a different length shaft so the frpp went into my dd 88 hatch which has every bolt on minus power adder.