Is it time to replace your race suit? Let’s get you track-ready. The Complete B-G and MOMO Subaru Steering Wheel Hub Guide
Subaru is one of those makes where the boss kit you need depends far more on which model you own than on which brand you fancy. I am Cameron, I look after the steering wheel side of things at GSM Performance, and this one comes up most weeks.
The short version. B-G Racing cover the older and rarer Subarus, the Justy, the Leone, the M80 and the SRX, and they also do the BRZ. Own an Impreza or a Legacy and your hub comes from MOMO or OMP instead. People search for a B-G Impreza hub, find nothing, and assume we do not stock one. We do. It just has a different name on the box.
Below is the whole Subaru range we hold, what each hub actually covers, and the wheels that bolt to it.
The in-car photograph in this guide is an AI illustration, generated from our own MOMO product photography so the wheel and its horn button are the real thing.
Why you need a B-G or MOMO boss kit
An aftermarket wheel will not bolt onto a Subaru column on its own. The column has splines, the back of the wheel has a bolt pattern, and the boss kit is the part that joins the two. It also sets how far the wheel sits from the dash, which decides your reach to the indicator stalks and the clearance over your knees.
Both brands machine theirs from cast aluminium and put the fixing screws, the Allen key and the horn button retaining ring in the box, so nothing is missing halfway through the job. The B-G kits are made in Italy. The MOMO ones come out of the largest hub application catalogue in the business, which is why they reach models B-G do not.
It joins two different fittings
Your column has splines. The back of the wheel has a bolt pattern. The hub is the only part that speaks both.
It sets how far the wheel sits
The hub decides the distance from the dash, which changes your reach to the indicator stalks and the clearance over your knees.
Nothing else to buy
The fixing screws, the Allen key and the horn button retaining ring are all in the box, so nothing stops you halfway through the job.
Match the listing to your car rather than to the model name on the badge. Our Subaru hubs are split by model and year because that is where the column changes. The Justy has one hub, the Justy F35S from 1993 has another. The Impreza from 1992 to 1998 takes a different part to the WRX STI from 2003 to 2006.
A few of them double up. BG8116 is the same hub whether you buy it under the Justy, the Leone or the SRX listing, and MOMO MK7306 covers the early Impreza, the Legacy 1.8 to 2.0 and the Libero. If you are not certain which side of a year split your car falls on, send us the registration and we will check it before you order.
Steering wheel installation explained
So how does a Sparco wheel end up on a MOMO hub? Because nearly every aftermarket motorsport wheel is drilled to the same pattern, six bolts on a 70mm circle, written as 6 x 70mm PCD. MOMO, Sparco, OMP, Simoni Racing and the Mountney M-Range all use it. The hub is chosen by your car, the wheel is chosen by you, and nothing locks you into one brand.
MOMO, Sparco, OMP, Simoni Racing and the Mountney M-Range.
Nardi, Personal and Raid.
Fitting it, in order
- 1Hub onto the column
- 2Wheel onto the hub
- 3Horn wire onto the tab
- 4Retaining ring holds the horn button
How each brand drills its hubs
Popular Subaru B-G boss kits
Six B-G hubs in the Subaru range. Five of them are the older cars and sit at the same money, and the BRZ is its own part at a higher one. Every one is dual drilled, so any wheel further down this page will bolt straight to them.
The design does differ between them. The BRZ hub is a collapsible type and the rest of the Subaru B-G hubs are solid. Each listing states which, so check before you order if that matters to you.
Our top MOMO Subaru boss kit collection
Four MOMO hubs, and this is where the Impreza and the Legacy live. All four are the collapsible design MOMO introduced, and all four are drilled 6 x 70mm.
If you have a 2003 to 2006 WRX STI then MK7310R is your part, and it is the only listing that covers it. The earlier 1992 to 1998 Impreza shares MK7306 with the Legacy and the Libero, so those three owners are buying the same hub under three different listings.
Explore our full range of B-G and MOMO boss kits
The links here run a live search across the store, so they stay current as the range moves. Worth knowing that OMP make Subaru hubs too, and they cover ground the other two do not: the Impreza, the WRX STI, the Legacy, the E10 to E12 and the Lexcombi. Those are a solid, non-collapsible design, which is what most track and competition cars run. If your Subaru is not showing up in any of the three ranges, ask. Some cars share a part with a model that is listed, and we can usually work out which hub suits from the column.
B-G Racing
6 Subaru hubs
Dual drilled for both bolt patterns and made in Italy. Covers the Justy, Leone, M80 and SRX, plus the BRZ.
View the B-G Racing Subaru range
MOMO
4 Subaru hubs
Collapsible and drilled 6 x 70mm. This is where the Impreza and the Legacy live.
View the MOMO Subaru range
OMP
5 Subaru hubs
A solid, non collapsible design, which is what most track and competition cars run. Adds the WRX STI and the Lexcombi.
View the OMP Subaru rangeWhy not add a steering wheel quick release kit
A quick release sits between the boss kit and the wheel and lets you pull the wheel off the column in a second. Two reasons people fit them. Getting in and out past a fixed wheel in a caged car is awkward, and a wheel that comes off with you is a wheel nobody can drive away with.
B-G Racing do four. The universal and the standard bolt-on versions suit most road and track cars and need nothing modifying. The weld-on 3-point and 6-point are for a car where the column is being cut and welded anyway. All four take the same 6 x 70mm wheels as everything else on this page.
Pair your boss kit with a high performance steering wheel
Once the hub is sorted the wheel is entirely your choice. These are the ones I would put in a Subaru, and there is a real spread of diameter, dish and price here rather than ten versions of the same thing.
For a rally flavoured Impreza the MOMO Mod.03 takes some beating, 350mm with an 87mm dish that pulls the rim closer to you, black suede, and a yellow marker at the top so you always know where straight ahead is. If you want something more classic in a Leone or an early Legacy, the Prototipo is the one.
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From £217.99 Excl. VAT Select options This product has multiple variants. The options may be chosen on the product page
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Every wheel we sell is drilled 6 x 70mm, so any of them will bolt to any of the hubs above. The only real decision is diameter and dish, which changes how heavy the steering feels and how close the rim sits to your chest.
Final thoughts
Between the B-G, MOMO and OMP ranges there is a Subaru hub for almost everything, from a 1985 Leone to a 2012 BRZ. The part is cheap next to the wheel, and getting it right is just a case of matching the model and year in the listing to your own car.
If you are stuck between two listings or your car is not showing up at all, drop us a line and ask for me. Send the registration over and I will tell you which hub you need before you spend anything.
Cameron