There's always a lot of questions about mods, like what's available, prices and so-forth. So I decided to make a definitive mod list including links and prices. I will keep this list updated so if I'm missing something, please let me know and I'll update the list to include it. Prices are as of May 2010 and may have changed.
Intake
GruppeM Intake
Contact Gary@RENN-Spec (
http://www.zpost.com/forums/member.php?u=35875)
Retail: Around $900
AFe Intake
http://www.**********s.com/AFE-Stage...1-51-11521.htm
Retail: $488
RPi Scoop
http://www.**********s.com/RPi-ram-a...ake-scoops.htm
Retail: $129
BimmerWorld Street/Race HFM
http://store.bimmerworld.com/e46-m3-...box-p1242.aspx
Retail: $3099
Street/Race (without mass air fitting): $3199
Motorsport (for race built engines only): $3199
ECU Tune
ESS
http://www.esstuning.com/products/E8...Software-.html
Retail: $795
Headers
Supersprint
http://www.**********s.com/_e/E85_M_...e_Roadster.htm
Retail: $1,709
Supersprint Stepped Ver. 2 (LHD Only)
http://www.supersprintna.com/product...arch_model/292
Retail: $1,604
Active Autowerke Gen 4
http://www.activeautowerke.com/viewp...?id=Product28a
Retail: $1,800 Usually: $1,700
Mufflers
Supersprint Race
http://www.**********s.com/_e/E85_M_...e_Roadster.htm
Retail: $1,430 found for $1,350 on LeatherZ
Supersprint Powerloop
http://www.**********s.com/_e/E85_M_...e_Roadster.htm
Retail: $2,200 found for $2,100 on LeatherZ
Remus
[img]http://www.**********s.com/images/Products/RemusExhausts/50513_copy.jpg[/img]
http://www.**********s.com/_e/E85_Ex...m_2006_Z4M.htm
Retail: $1,496 Sometimes found for: $1,260
Stromung
http://www.stromungexhaust.com/Video.asp?VideoID=3540
Retail: $895
RE Diablo
http://www.rogueengineering.com/Merc...gory_Code=MZ4X
Retail: $1,195
RPi
http://shoprpi.com/product_info.php?...roducts_id=133
Retail: $965
Differential
Dinan
http://www.dinancars.com/store/produ...cat=757&page=1
4.10 Retail: $3,199 3.91 Retail: $2,499
Turner Motorsport
http://www.turnermotorsport.com/html...3-DIFFERENTIAL
4.10 and 3.91 Retail: $2,495
Turner Motorsport R&P Only
http://www.turnermotorsport.com/html...CT_ID=E46M3-RP
4.10 Retail: $949 3.91 Retail: $799
Supercharger
ESS VT1-445
http://www.esstuning.com/products/Z4...8Gen.2%29.html
Retail: $6,795 Group Buy: $5,995
Suspension
Dinan Springs
http://www.dinancars.com/store/produ...cat=389&page=1
Retail: $286
H&R Springs
http://www.**********s.com/_e/E85_Su...M_Roadster.htm
Retail: $300
H&R Street Performance Coilovers
http://www.**********s.com/_e/E85_Su...BMW_E85_Z4.htm
Retail: $1,343
KW Clubsport Coilovers
[img]http://www.**********s.com/images/Products/KW_Coilovers/KW%20Clubsport%201.jpg[/img]
http://www.**********s.com/KW-Clubsp...ilovers-Z4.htm
Retail: $3,959
Ground Control Coilovers
http://www.ground-control-store.com/...p/II=687/CA=11
Retail: $1,749
Strut Brace
OEM
http://www.trademotion.com/partlocat...catalogid=4462
Retail: $320
Strong Strut
http://www.strong-strut.com/pricing.htm
Retail: $395
Dinan
http://www.dinancars.com/store/produ...cat=389&page=1
Retail: $499
Brakes
Brembo
http://www.turnermotorsport.com/html...&subcat_id=144
Retail: From $3,195 to $4,250
Stoptech
http://www.turnermotorsport.com/html...ID=83.155.6747
Retail: $5,790
Body Mods
OEM Side Skirts
http://www.trademotion.com/partlocat...catalogid=4462
Retail: $840 ($245 per side + $175 to paint per side)
OEM Carbon Fiber Spoiler
http://www.trademotion.com/partlocat...catalogid=4462
Retail: $315
Tekarbon Carbon Fiber Spoiler
Contact Eric:
http://www.zpost.com/forums/member.php?u=42311
Retail: $209 shipped
Grills
Carbon Fiber
[img]http://www.**********s.com/zoom_img/_1253810107.jpg[/img]
http://www.**********s.com/Carbon-Fi...BMW-E85-Z4.htm
Retail: $155
Matt Black
[img]http://www.**********s.com/images/Products/Auto%20Tecknic/IMG_7529.jpg[/img]
http://www.**********s.com/_e/E85_Ex...Grilles_Z4.htm
Retail: $90
Knobs
ZHP
http://www.trademotion.com/partlocat...catalogid=4462
Retail: $60
Reflector Decals
Dans Decals
http://www.dansdecals.com/BMW-Reflec...s-P274C73.aspx
Retail: $20
More to come.