BMW Classing
This season we will continue with our reduced BMW classing to just 6 classes; Showroom 1 & 2, Tuner 1, 2, 3 & Modified. There have been modifications to the classing of cars in these classes, as reflected below.
Each Group is aimed at grouping vehicles with similar performance capabilities. If your specific car is not listed below, please contact the classing coordinator to determine your class.
NCC Autocross allows BMW SAVs bearing the factory M designation (i.e. X5M, X6M, X3 M40i, etc) and SAV’s equipped with aftermarket lowering suspension. Models not meeting this criteria will not be allowed to participate due to rollover risk. If you have any further questions (or questions about eligibility of SAVs from another manufacturer) please email us at info@nccautocross.com.
BMW Showroom Classing
| S1 | S2 | S3 |
|---|---|---|
| i8 | M3: E30, E36, E46 | 320 F30x |
| Z8 | M Coupe and Roadster 1998-2000 (S52 engine) | 3 Series E36, E46, E9x non-turbo |
| M8 | M5 All | 5 Series 1985-2003 |
| 1 Series M Coupe | X3M, X5M | 6 Series 1984 - 1989 |
| M2 All | 1 Series All non-M | Z3 4 cyl |
| M3 and M4 (F8X) | 2 Series All not M2 | i3 |
| M3 (E9X) | 335i Series E9X | All BMW not otherwise classed |
| M Coupe and Roadster All | 3 Series F3x 2012 on except 320i | |
| Z3M 2001-2002 (S54 engine) | Z3 6-cyl non-M 1997-2002 | |
| Z4 M Coupe and Roadster Including M 2002-2017 | 4 Series (all) | |
| Z4 M40i | Z4 not otherwise classed | |
| 5 Series 2004 and newer | ||
| 6 Series 2003 and newer |
BMW Tuner Classing
| T1 | T2 | T3 |
|---|---|---|
| M3: E36, E46, E92, F80 | All 1, 2, 3, & 4 Series Turbo Cars (Non-M) | All E30 (Non-M) |
| M4 | All non-M F30 Series Cars | All 4-cyl (non-turbo & not otherwise classed) |
| 1M | E30 M3 | All 3 Series 6-cyl (not otherwise classed) |
| M235i (including xDrive) | M8 | All BMW Older Than 1991 (not otherwise classed) |
| M2 and M2 Competition | E60 M5 | All 5 Series (not otherwise classed) |
| Z3 M Roadster & Coupe (S54) | E63 M6 | All 6 Series (not otherwise classed) |
| Z4 M Roadster & Coupe | Z4 (not otherwise classed) | All 7 Series |
| Z4 (M40i and 35i variants) | Z3M Roadster & Coupe (S52) | All 8 Series |
| X3M, X4M, X5M | i3 | |
| i8 |
BMW Modified Classing
| All BMW Cars Meeting Criteria for Modified Class No Matter What Model |
The Performance Class establishes the permitted modifications for each group. If a modification is not listed, it is NOT permitted.
NOTE: If the wheels and suspension items were FACTORY options on the model, it is permissible to interchange. BMWNA’s recent offerings of “high performance dealer installed” items are a different, and are not permitted as a showroom allowance.
BMW/Mini Modification Classing
| Showroom (S) | Tuner (T) | Modified (M) | |
|---|---|---|---|
| Wheels | Stock wheel width and diameter must be stock +/- one inch. Wheel spacers allowed but tires must not extend past fenders | Free | Free |
| Tires | DOT approved w/200+ treadwear rating (OEM tires if lower rating) | Any size DOT approved tires w/200+ treadwear rating | Any size tires with DOT approval |
| Brakes | OEM size rotors & stock size brake pads | Free | Free |
| Shocks & Struts | Adjustable shocks permitted but must retain original mounting points | Adjustable shocks permitted but must retain original mounting points | Free |
| Springs | Stock | Free | Free |
| Strut Bars | Aftermarket front strut bar permitted | Free | Free |
| Sway Bars | One sway bar may be changed or removed | Free | Free |
| Other Suspension (including bushings) | Stock | Any non-metal | Free |
| Seats | Stock | Free | Free |
| Intake & Manifold | Stock - Fit replacement air filter permitted (Example: K&N Drop-In) | Free | Free |
| Steering Wheel | Stock or factory option | Free | Free |
| Software/Tuning | Stock | Free | Free |
| Nitrous | Prohibited | Prohibited | Prohibited |
| Methanol Injection | Prohibited | Prohibited | Free |
| Carburetors | Downdraft Webber permitted | Free | Free |
| Internal Engine Modifications | Stock | Stock | Free |
| Body Panels | Bumper panels may be replaced | Free | Free |
| Aerodynamic | Free | Free | Free |
| Power Pulleys/Underdrive Pulleys | Stock | Free | Free |
| Headers & Exhaust System | Axle-back (muffler only) replacements permitted. No change to catalysts allowed | Headers free, catalysts required on 96+ cars | Free |
| Aftermarket Forced Induction | Prohibited | On cars equipped from the factory with turbo/superchargers, the boost may be raised either by tuning or pulley changes | Free |
| Intercoolers | Stock | Free | Free |
| Differential | Stock | Free | Free |
| Short Shifter | Free | Free | Free |
| Clutch Stop | Free | Free | Free |
| Flywheel & Clutch | OEM or equivalent | Free | Free |
| Rollbar/Rollcage | Bolt in units permitted | Free | Free |
| Restraints | Stock/CG locks permitted | Free | Free |
| Engine Oil Cooler | Free | Free | Free |
Looking at the Autocross classses, I have a 1998 318ti in the modified class but I am guessing M2 bases on the E36 class?