Matrick None
April 22, 2010 9:57 p.m.

Hi my GRM people,

What are the differences between the E30 325i, 325is, and E30M3 FR and RR anti-roll bars? What is the difference between E30 325is and 325i shocks? If the valve code is different, then will the 325is shocks fit on a 325i?

2002maniac Reader
April 22, 2010 10:11 p.m.

All e30 front swaybars are the same with the exception of the convertible which is thicker.

E30 M3 rear bar is thicker than the rest.

The shocks are the same.

WilberM3 Reader
April 22, 2010 10:49 p.m.

rear 325i/s is a 12mm bar and m3 have a 14.5mm. front 325i/s iirc is 20mm (i think cobrios are 21mm) and the m3 actually has a smaller 19mm bar, though it mounts to the strut housing rather than the control arm so its effective stiffness is different.

rear shocks all interchange. i think there were two differently diameter'd strut housings early ones being smaller if so (but i may just be thinking of rear wheel bearings), but all i/is cars have the same housing size as m3 so theyre swappable, though the housings are very different.

miatame Reader
April 23, 2010 8:05 a.m.

He knows his E30s, listen to him

ManBearSTIG New Reader
April 23, 2010 8:32 a.m.

The only difference in strut housings was between early 318s and 325s. Later 318s (M42 model) had the same size strut housings as all the 325s, though.

z31maniac
z31maniac Dork
April 23, 2010 9:01 a.m.

WilbeR is correct.

Many weld the sway mounting tab on to the struts of non-M cars to gain the increase in leverage on the sway bar.

You'll need to log in to post.

Also on Grassroots Motorsports

Join the Grassroots Motorsports Dyno Day

1 day ago in News

Join us for a dyno day in Sterling, Virginia.

From the GRM Vault: The Art of Understatement

2 days ago in Articles

The Harvey brothers dominated autocross in an obsolete Datsun a couple decades ago.

2017 Volkswagen Golf TSI SE

2 days ago in New Car Reviews

The quintessential European hatchback continues to pour out of Volkswagen's plants. Our test car featured four doors, a turbocharged 4-cylinder ...

We're Giving Away a $500 Race Ramps Certificate

3 days ago in News

Joining the drawing is totally free.

25 Project Path

4 days ago in Articles

A walk through 25 of our favorite project cars from the past.

Our Turbo Miata Goes Boom

4 days ago in Project Cars

Engine swap and suspension revamp before our race in two weeks? Challenge accepted.

The Ultimate Weekend Getaway for Your Car Club

5 days ago in News

Save a corral space just for your club at the Mitty.

Reader's Ride of the Week: V8 Jag

5 days ago in News

It’s a long-wheelbase 1974 Jaguar XJ6 fitted with a 350-cubic-inch Chevy V8.

Honing Cylinders

5 days ago in Project Cars

We hone our LS1's cylinders

Break Maiden

1 week ago in Articles

Creating a turbocharged road racing champion from a vintage Ford Mustang.

Meet Us at Sebring

1 week ago in News

We'll be at the Mobil 1 Twelve Hours of Sebring. Will you?

2017 Honda Accord Coupe Touring

1 week ago in New Car Reviews

Honda has been pumping out Accords for over 40 years now. Obviously they have a recipe that just plain works. ...

OUR SPONSORS

Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More
nZ7L0gA2co0kphhwE1qxnAYmY3RmFMCe