Vishnu Performance Systems

FatCat Bump Stops

Shock mount kits with bump stops and MCU bushing option

[11/19/2007] Reviewed by: Thomas Miro - TMiro3438@aol.com

Applicable to: '90 - '97 1.8 liter

NB shock mount retrofit for NA cars. My kit also included MCU (microcellular urethane) bump stops and a new MCU bushing option.

This kit was the final piece to complete the suspension upgrade for my 96 M-Edition. Combined with Flyin' Miata's springs and KYB AGX 8 ways, this combination was a welcome relief to my worn out stock shocks, too tall springs, and harsh OEM bump stops. Shaikh was temporarily short on some of his stock, and it delayed his delivery of my order, but he graciously included a new option, MCU bushings for the shock mounts, replacing the standard rubber mounts. Installation was straightforward - although chose to pop the upper ball joint out of the spindle rather than removing the upper control arm bolt. Total time for installation was approx 3.5 hours.

The combination of FM springs and NB shock mounts brought the car way down - remarkably, the ride, compliance, and overall NVH (noise, vibration, and harshness) is far better than stock - driving over speedbumps at speeds that drove the earlier suspension to the bump stops now result in smooth suspension response. An excellent product from a very motivated and conscientuous vendor. Thanks, FatCat! Now for that new alignment . . .

Not an installed item


Fat Cat Motorsports bump stops

[8/3/2007] Reviewed by: Ed B. - time4lime@verizon.net

Applicable to: '90 - '97 '99-'05 1.6 liter 1.8 liter

46mm Low-density micro-cellular polyurethane foam bump stop replacements

I bought these bump stops along with the red dust boots. It all came packed nicely together along with zip ties and washers (that fill in for the washers that are built in to the stock bump stops). They were light, sort of shiny, mayonnaise-colored and about the size and shape of a shift knob. I put them in at the same time I installed Apex lowering springs. Compared to many other lowered cars I've owned and driven, my newly-lowered 93 inspires none of the aggravating worry of endless, bone-rattling thumps treatening me at every turn. The Apex springs brought the car down 30mm. That isn't a whole lot, but I know when I've bottomed out and it's nothing like the old days when tears would practically splash out of my eyes. I printed instructions from the website and they were useful. Technically speaking, it's not a difficult job to put these on compared to the stock ones. I love'em. And I love knowing they're there. They have a nice 'high-tech' feel. I don't know exactly how much lighter the new set-up is, but put the stock bump stops/boots in one hand and the new boots and stops in the other and you'll feel the difference. That's definitely always a good thing. Also, when you improve the way a car handles you improve your control and your enjoyment level as well.

When talking about these bump stops, it's difficult not to also talk about the company. And, the man behind the company. That closeness is the result of him (Shaikh Ahmad) standing by his products and consequently, his customers. In the middle of a mid-afternoon install a continent away, he got back to me just 20 minutes after I left him a message saying I needed a bit of advice. He was pleasant, well-spoken and helpful. How often do you get THAT these days? Let's face it- a lot of things people do to personalise or customise their cars don't add up to actual improvements. Just because you unscrewed and replaced something original with an item you saw on a shelf somewhere doesn't necessarily mean you made it better. Often, bolted on replacements are a lateral move, frequently even a backwards one. FCM bump stops are different. They're a win-win situation. Don't feel like tinkering with your Miata? Then have a four-pack of these on hand for when you do have your shocks rep! laced. These are for everyone.

Over 30 minutes to remove completely


Bump Stops

[3/25/2007] Reviewed by: phil kochan

Applicable to: '90 - '97 1.8 liter

bump stops

Love my 96 miata's ride now, I combined with KYB's at "1" setting, I'm not an autocrosser just looking for an upgrade for my daily driver. Also happy with ordering process, paypal had an old address listed and FatCatMotorsports re-sent to correct address in 24 hours, I recommend highly.

Under 30 minutes to remove completely


FatCatMotorsports Bump Stops

[9/14/2006] Reviewed by: gianluca filippini - gianluca@autosburla.com

Applicable to: '90 - '97 1.6 liter

bump stop custom-molded using low-density micro-cellular polyurethane.

I have new KYB AGX shocks with lowering EIBACH springs on a 1990 miata. I was not happy about the “hard” feeling on my original bump stop. Looking on internet I’ve found these FCM bump stops. Talking with Shaikh I decided to go for 4 new FCM bumpstop and the result is simply GREAT!! The evidence is impressive on the front: more handling, less micro-vibration on short turn, more traveling course with a soft but FIRM response. On the rear the main improvement is the softer feeling on small bumps, which is also less loud, giving you a more quite driving.

I will recommend these bumpstops, the price you pay give you high satisfaction immediately.

Over 30 minutes to remove completely


FatCatMotorsports Bump Stops

[3/26/2006] Reviewed by: Jim Gaydusek - jimgaydusek@sbcglobal.net

Applicable to: '90 - '97 1.6 liter

FCM Bumpstops

The compound that these bump stops are made of provide for a smoother ride than stock bump stops. I installed them along with KYB AGX shocks and am thoroughly satisfied with the performance of both items. Compared to factory bump stops, there appears to be more travel in the FCM's and both the ride and handling characteristics have been greatly improved.

FCM was very helpful in my shock absorber selection decision and was neutral towards the selection of the bump stops.

Not an installed item


Fat Cat Motorsports Progressive 54mm Bump Stops

[1/16/2006] Reviewed by: Larry Badiner - lbadiner@sbcglobal.net

Applicable to: '90 - '97 1.6 liter 1.8 liter

Replacement Bumpstops for NA

I installed these with New KYB AGXs last week.

I was really struggling with what to do with my suspension. I live in San Francisco, and the streets are pretty rutted. I knew I wanted to go with KYB AGXs, and was considering FM Springs, but heard they caused you to bottom out unless you got the replacement shock mounts. Shaikh convinced me to try his Progressive Bumpstops with the original springs. For about $40, I think they're great. If you're replacing the shocks, it's just as easy to install these as the original bumpstops. Now, I'm sure that it's AGXs that improved the ride and handling, but I no longer bottom out on my two "test" bumps. These previously had to be taken about 5 mph or risk whiplash. Now I don't have to particularly slow down. Even my teenage daughter noticed. That's got to be the Bumpstops. Highly recommended!

Over 30 minutes to remove completely


Back to Product Reviews 23 August, 2003


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