Polyurethane Differential Bushing Insert Kit for NA and NB
Polyurethane Differential Bushing Insert Kit for NA and NB
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Description
The differential is mounted in the car with some surprisingly flexible rubber bushings. Replacing these with stiffer bushings will cut down on differential movement, but they're a headache to install. Looking for an easy answer? Enter these bushing inserts. These inserts, made by SuperPro, fill in the voids in the stock bushings to minimize the movement of the differential - this actually makes your shifting more precise due to the way the Miata's drivetrain is mounted. They're a pretty easy install, as you just have to lower the differential enough to get it off the studs in the subframe, slip the smaller part into place, then put the bottom piece in place. With full replacement bushings, you need to remove the differential altogether then remove the stock bushings (which typically requires fire. Seriously.). A definite plus for competition cars - you don't want to hit 5th instead of 3rd in the heat of competition!
Bushing inserts fit 1990-2005 only.
Instructions
Shipping
What does it fit?
Fits: 1990-1997
Emissions
Emissions do not apply.
Warranty
lifetime
SKU
I am rebuilding a 1993 Miata and have been firming up it's old flexy parts. I am fortunate to have a lift, so installing was a breeze. Can't wait to drive it.
I’m sure you’re wondering about NVH with this product. I’ll be first to tell you it is so mild that it is not truly distinguishable from regular road noises. If I had to be a critical I’d say when going from hard throttle to off throttle , it would have to be the only time I have noticed any sort of differential wine. Moving on to performance… the product does exactly as it says and tightens the rear end up . Let’s say you do a burn out no more wheel hop. Along with the car feeling more planted in the turns oddly enough And throttle response is a bit more 1-1 . The biggest noticeable difference is after ripping through gears . The gear box stays firm where it is and feels planted , no miss shifts or shifts that are close to a money shift. My other mods that would effect this review would be upgrades rear sway bars/stiffer bushing, coils with 2 inch lowering + aggressive camber and poly sport engine mounts. Installing wasn't to hard I’d say a 5/10 if you are handy with it but who isn’t, your an Miata owner after all. If you have extra bracing it’s tough but just save yourself the struggle and remove it for this install if ya don’t have it the install is a extremely easy.
Just as advertised. Installation was very simple. Haven't driven the car yet as the turbo installation isn't completed but looking forward to the extra shifting stiffness!
Super easy install compared to changing out the diff bushing and for 60$ it was well worth it
Well thought out and easy to install.Flyin’Miata is allways a pleasure to deal with.