[M.P. Cobra Fan]

4.10's were a night and day difference in my car. When I did the gears I also added the MM IRS diff bushings, Steeda IRS brace, and MM FLSFC. Wheel hop has been reduced, but is still present on some launches. The harder I get on it on the launch, the less hop, but the more spin. I have to be very careful in the rain now because if I am rolling and do not accelerate smooth in 1-3 the wheels spin and the car slides sideways.

As for the pulleys, if they are worth it is all a matter of opinion. Alone, no bolt on is really worth it. Once you start adding them all together though the story is different.

 

[M.P. Cobra Fan]

Read This
The Mystery of the Cobra Independent Rear Suspension - SVTPerformance

 

[M.P. Cobra Fan]

Both companies are excellent. Both offer an excellent product. It all depends on how hard you are going to be driving the car. I have started replacing the bushings in my car and choose to go with MM. I chose them for 2 reasons. 1, my car is a mall cruiser, not track car. 2, price. Delrin bushings just seemed a little rough for what I was doing. I stil want to keep the ride smooth. However, I have since talked to people with the FTB delrin ki, and they have assured me their ride is smooth. I have thought about finishing the car up with the delrin on those harder to replace bushings.

 

[M.P. Cobra Fan]

The FTB kit is HUGE on SVTP. MM is very much a serious player in road racing as well. I don't know anyone personally who has had the MM ones wear out, but it is poly so who knows. I would never bash FTB, nor am I am MM nutswinger. If I bought something that I regret I would say so. I do not regret the MM purchase as of yet. Although, like I said, I will probably be going over to the FTB delrin kit once I can down the car for a while.

 

[M.P. Cobra Fan]

I get less hop now with the 4.10's. More spin though.

 

[M.P. Cobra Fan]

No, you really don't need bushings, but it is a very smart move. You might as well replace atleast the IRS Differential bushings while you have the diff out of the car though. This will only add a couple of minutes to the total install time, and the ones from MM are not a bad price either. I would HIGHLY recommend atleast doing that. FTB or MM your choice, but do atleast on of them. I would also highly recommend getting one of the braces installed at the same time. Putting it in later is just going to cost more money in the long run.

As far as breakage, you will only have to worry about it if you are dirving the car hard.

 

[M.P. Cobra Fan]

It's not just wheel hop. You can control wheel hop with the right set of springs and throttle control. However, if you have sloppy diff bushings, your diff will still shake like Oprahs thighs. Your diff shaking is bad bad bad.