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IL Motorsport Rear Chassis Brace, MX5 Mk1/2/2.5

SKU: 247

IL Motorsport Rear Chassis Brace Bar

This chassis brace was designed by a NASCAR chassis engineer for maximum rigidity. Each brace can be fitted in minutes and uses existing mounting holes. Even better, as you do not have to disturb any suspension mountings, there is no need to have wheel alignment carried out after fitting.

These braces are now made for us in Europe allowing us to both reduce the price and monitor quality control thereby bringing you a better product at a better price!

This rear bar can even be used in addition to the factory bar fitted to later cars for even greater strength.

Fits all Mk1, Mk2 & 2.5 models, 1989>2005

Fitting Instructions


Based on 24 reviews

Simon Worley
Fitted to my mk2.5 bolt holes line up 100% but with a standard exhaust it requires the ends of the tubes to be cut shorter at a angle to clear the exhaust. Not a big problem but fouls until cut.
21/07/2022 12:17:07
Marcos Ortiz Revert
Instalé esta barra en un NB2 con el escape de origen y, como ya se ha comentado aquí, los extremos chocan con el silenciador pues apenas si hay 1 cm de holgura y distancia entre ellos.La solución? en vez de mover la posición de la goma que sujeta el silencioso, como se ha dicho por aquí también, yo opté por lo seguro: rebajar -limar- la longitud de los extremos. Y lo hice al máximo, todo lo que pude hasta casi llegar a las soldaduras. Pero el corte lo hice con inclinación, en ángulo, rebajando más en la parte más cercana al silencioso, de manera que he ganado bastante distancia y ambos elementos no se tocan por mucho traqueteo que haya.Lógicamente, después de rebajar los puntales, tuve que pintar la pieza, cosa que no le vino mal pues el acabado de la misma es bastante justito (tanto en pintado como en soldaduras). Por todo lo demás me parece un elemento útil, que se ajusta perfectamente (casi parece un refuerzo más de origen), y que se instala en minutos incluso sin tener que levantar el coche. Una lástima que se fabrique con este defecto de tan fácil solución, pues acortando un poco los extremos y dándoles cierto ángulo en los cortes encajaría perfectamente a la primera.
11/03/2020 12:16:06
Daniel Richmond
Really light but feels super solid. Fitted in ten minutes. I removed the rear tie hooks I noticed when I fitted this brace and I'm pretty sure the car now weighs less ! Not had a chance to hit the twistys yet to check performance
05/03/2017 12:16:15
Nick Reed
Was dubious on the difference this would make, but for everyday use, this does smooth out the ride and removes quite a bit of shake from the rear of the car. The car is now noticeably quieter.I previously fitted a front chassis bar, and then completed the set after a few weeks. Front definitely makes the biggest difference, but rear is worthwhile if you don't have any bracing in place.Only surprise is that the nuts are 1/2 inch imperial! Had to dig out my old spanners to fit.
03/03/2016 12:16:18
Chris Allen
If you are considering buying this, just do it! I've just added front and read chassis braces to my '96 Mk1 1.6l which didn't have them factory fitted and it makes a big difference. Not just handling is improved even more, but the ride is much more comfortable over bumpy roads and those damn thick paint strips on the way into 30 mph limits! The car feels more predictable and stable when cornering at high speed but I'd say worth it for the ride improvement alone. Dead easy to fit, didn't even need to jack up for rear brace. Instructions from MX5parts are better than manufacturers but IL Motorsport's website has lots of photos from different angle so you can check where they go (referred to as "connection rod, back):
31/08/2014 12:16:23
Kevin Jones
I purchased one of these and it does improve the handling and ride on my Mk2.5 feeling far more secure and helps to reduce scuttle shake along with front top and bottom braces. However the one section of the rear brace fouled the MX5 parts back box fitted to car. Luckily I have a small engineering company in the village that I live, who allowed to use a bench grinder to grind a large 45% champher on the end of the tube to stop it fouling the back box. This could easily be resolved by the manufacturer doing it in the first place and this would stop the negative comments that appear on the site.I will say that MX5 parts always deliver in double quick time and I,m very pleased with everything I have bought from them and will continue to buy from them in the future.
17/01/2014 12:16:26
David Needham
Bought this on Sunday and received Tuesday due to bank holiday. Well made piece with spot on fixings for my mk2. Had a lot of sanding to do because I wanted to paint it annodised red with a candy cane pattern. Came out really well. Seems to have tightened the back end up quite abit around the corners. You seems to feel where your back end is a lot more if that makes sense. Thanks guys for the great product and summer offers, love the online store!
31/08/2013 12:16:27
Rob Eggington
Ordered front and rear braces Thurs, arrived Fri and fitted Sat to my 1991 Mk1 - great service from MX 5 parts. These braces really do make a difference, make the suspension feel much more positive, cuts down 'skittiness' when cornering or riding over poor road surface. Can't understand why Mazda didn't think of these as standard items - if you have a Mk 1 with no braces, get some of these fitted!
30/06/2013 12:16:28
Steve Walker
Fits fine on a MK1 but needs to be upside down so the loop is at the top. Just bought a 2002 MK2.5 and it hits all of the exhaust pipes and back box. Solution is to cut the stubby open ends short with an angle grinder. 15 mins work job done and it now hangs as it should do with the loop at the bottom. Great piece of kit with the usual MX Parts super fast delivery but why do they make the studs so long when you can only get about 15 degree turn on a spanner?
20/10/2012 12:16:31
Ian Reynolds
My wife bought this together with the front brace for me for Christmas (aren't I a lucky chap?) These chassis braces have transformed the handling of my early Mk1! Previously it was a bit twitchy and skittish and it would rattle and slip over bumps and potholes. Now the chassis braces are fitted, it's a completely different car - it's planted, composed and solid. I can put down more power into bends now and it feels rigid and poised, just like my late Mk1. I'm delighted!Fitting the rear brace is a doddle and even the front brace was simple enough if you read the instructions carefully (I didn't, at the cost of a frustrated hour fitting the bolts the hard way). The bolt needs to be placed INSIDE the wishbone bracket, facing downwards, as opposed to how mine came assembled from the factory. It is then easily accessed with a spanner through the bottom gap between the lower wishbone and its bracket.It was unfortunate that the rather untidy welding, particularly on the front brace let down an otherwise excellent piece of kit, but I wouldn't let that stop you from getting a set!
08/01/2012 12:16:36

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