1998 Z3M LS3 swapped for sale add
Price for the car as it sits: $18,750 (read below for more options to buy)
I’ve owned this car since July 4th of 2014 so its been with me for some time. Picked this up as the cheapest Z3M in the country at that time (maybe still today) and drove it back to Chicago (where it was always garaged). I’ll start with the bad:

Cons:
•    Rebuilt title from 2006ish (I have pics of repair and everything that was damaged)
•    No Soft Top
•    No AC
•    Rear trailing Arms are non M

Pros:
•    Is very Fast, reliable and super fun
•    Has tons of reinforcement done including Randy Forbes Dual Ear diff
•    Has one of the best engine configurations you can get

I’ve daily driven this car at first, then started to track it back in 2016. I eventually swapped a S54 in and used it as a track car with that. Eventually pulled the s54 and swapped in a dry sump Ls2/3. Since Late 2024, I have been using a different car as my track car (another z3 coupe) so this thing does not get the time or attention it deserves. 

In the interest of keeping it, I removed the CAE shifter and my Recaro seats and replaced them with a factory shifter and whatever z3 factory mismatched seats that I had on hand. 

Currently, the car has APEX wheels on it that are 17x9 245 front and 17x9.5 275 rear with Pilot Super Sports. Should you want this as a track focused car, all you have to do is throw your own seats in and go enjoy any track event. If you want to street drive it, its ready as is (or find better seats).

It is 100% reliable as it sits today, needs absolutely nothing. I would have no hesitation to jump in and drive it across the country. I’ve personally put many track miles and street miles (7 thousand) over the last 5 years. It doesn’t get driven much now a days so I keep it at my business partners house in Highland Park IL (which is where you can view it). 

You can purchase the car in a number of different ways. Here are some options:
As is with everything listed:    $18,750
No engine/dry sump/no aim system (you keep transmission): $11,000
Rolling shell with all suspension (no diff, no aim, no trans, no front brakes):    $7,000

I’m happy to discuss different variations with a potential buyer. Everything done to the car I did myself so please ask anything you might want to know. 

Here is a full breakdown of the build:
engine (including harness and sensors)
    aluminum 6.0 short block with DSS +6cc dome pistons 
    fresh 821 ls3 heads
    full BTR valvetrain with trunion upgrade
    BTR stage 2 cam (227/235 duration) 114 LSA
    all new gaskets
    balanced and blueprinted crank 
    Fresh Melling Block Mount 295 oil pump
PSI conversion gen 4 engine harness with all OEM sensors
dry sump    
    Aviaid 2 stage scavange pump (direct block mount)
    ARE oil pan
    Aviaid 2 gallon oil tank
    XRP -16 feed and -12 scavange
accessories    
    Y body water pump and Alternator spacing
    custom e46 power steering brackets and oem steering pump
fuel system    
    Aeromotive regulator and fuel filter
     -6 vibrant lines for feed and return
    walbro 255 in tank pump
    factory Ls3 42lb/hr injectors flow tested
trans adapter
    PMC ls to zf5 adapter
clutch/pressure plate
    ACT HD pressure plate and 6 puck clutch disk 
zf 5 speed transmission (rebuilt to the extent that parts allow)
    detents/seals/fluid fresh
driveshaft    
    shortened to custom length to fit 1.35" set back
rebuilt  2.93 torsen LSD
    fresh seals/bearings/stubs
headers    
    CX racing headers wrapped in DEI header wrap
exhaust (custom 2.5 header back with x pipe and twin Borla ProXS mufflers)
mounts    Pensultucky adjustable LS mounts
radiator/fan    
    CSF e36 radiator
    Spal 16" fan
coolers    
    setrab 18" oil cooler for 12an plubming 
    power steering cooler 
steering shaft
    custom length Vorshlag steering shaft
power steering
    e46 factory pump with Chase Bays resevoir/custom lines
front brakes    
    Massive Lee Wilwood kit 332/32 with 6 pot front caliper
coilovers     
    TC Kline single front with 400lbs springs
    double adjustable rears with 500lbs springs
Aim system    
    AIM MXP dash with a host of sensors. Dash is a strada (non logging)
    but can be made as a logger with additional harware. GPS09 for
    lap times, oil pressure, temps, CAN connection, much more. 
misc    
    Lines, fittings, hoses, steering wheel, interior bits, etc