Miata Challenge

Miata TT Championship

Points Calculator 2026

Chassis Year

NA-NB 90-05+0 pts

Miatakart / Exocet+6 pts

06-08 NC1+15 pts

09-15 NC2/3+17 pts

16-18 ND1/124 non-Abarth+20 pts

2019+ ND2/3-124 Abarth+23 pts

Engine Internals

OEM internals+0 pts

Internal modifications+10 pts

Aspiration

Normally aspirated+0 pts

Supercharged+25 pts

Turbo+30 pts

Intake

OEM intake manifold+0 pts

non-OEM intake manifold+2 pts

ITB+5 pts

ECU

OEM+0 pts

Reprogrammed+5 pts

Exhaust

Non-OEM header (N/A)+3 pts

Non-OEM midpipe (N/A)+3 pts

Tire

340tw and above+0 pts

220-330tw+8 pts

80-200tw+14 pts

All tires below 80tw+20 pts

Tire Width

195 or less+0 pts

205+3 pts

215-225+7 pts

235-245+9 pts

255 or wider+12 pts

Wheel Width

5.5-7+0 pts

7.5-8.5+6 pts

9-10+9 pts

10.5 and wider+13 pts

Final Drive Ratio

OEM, any year+0 pts

non-OEM+3 pts

ND auto diff gear in ND manual+3 pts

Transmission

OEM 5/6 spd manual+0 pts

Automatic-3 pts

Non-OEM transmission ratios+3 pts

Sequential or dog box+10 pts

Differential

Open+0 pts

OEM LSD+3 pts

Aftermarket LSD+4 pts

Suspension

Non OEM springs+3 pts

Adjustable damping+3 pts

Non OEM sway bar+2 pts

Non OEM control arm bushings+2 pts

Aero

Front spoiler/splitter <2″+2 pts

Trunk spoiler+3 pts

Front spoiler/splitter >2″+5 pts

Rear wing <9″ chord+3 pts

Large wing ≥9″ chord+6 pts

Rear diffuser+3 pts

Delete windshield frame+5 pts

Fastback roof+2 pts

Weight Reduction

Gutted/composite doors+2 pts

Gutted/pinned trunk+2 pts

Dash gut/delete+2 pts

Gutted interior+2 pts

Soft top delete+2 pts

Composite fenders+2 pts

Delete/tubular >10lbs tub+5 pts

Tubular subframe+2 pts

Polycarbonate windshield+2 pts

Delete door glass+2 pts

Remove passenger seat+2 pts

Safety (Negative Points)

5/6pt harness-2 pts

HNRS-2 pts

FIA seat-2 pts

Fire bottle/system-2 pts

Your Build

Point Summary

0

Total Points

Your Class

Street

(Max: 38 pts)

Class Breakdown

Street0-38

SuperStreet39-70

Modified71-100

SuperModified101-125

Unlimited126-126+