Engineering & Mod plates

At Relentless Chassis, every build that leaves our workshop is safe, road-legal, and fully certified. From chassis notches, 4-link rears, front-end conversions to complete custom fabrication, engine conversions, performance upgrades, everything we build meets engineering standards and comes with the correct Queensland modification plate for road use and insurance. Contact us on 0400006824.

 Codes we offer

At Relentless Chassis on the Gold Coast, we are accredited to certify TMR modification code available in Queensland. From light vehicles, heavy vehicles to trailers and custom fabrication, our workshop covers it all. If you can dream it, we can build it, certify it, and issue the correct QLD mod plate.

0400 006 824

Light Vehicle Codes

LA1, LA2, LA3, LA4
LB1, LB2
LC1, LC2, LC3, LC4
LG1, LG2, LG3, LG4, LG5, LG6
LH1, LH2, LH3, LH4, LH5, LH6, LH7, LH11, LH13, LH14
LK1, LK2, LK3, LK6, LK8, LK9, LK10
LM1
LO1, LO2, LO3
LR1
LS1, LS2, LS3, LS4, LS5, LS6, LS9, LS10, LS11, LS12, LS14, LS15, LS16
LT1, LT2, LT3, LT4
LX1

Heavy Vehicle Codes

A1, A2, A3, A4, A5
B1
C1
D1, D2, D3
E1, E2, E3
F1, F2
G1, G2, G3, G4, G5, G6, G7, G8
H1, H2, H3, H4, H5
J1, J2, J3, J4
K1, K2, K3, K5, K6
M1
P1, P2
R1, R2
S1, S2, S3, S5, S7, S8, S9, S11, S12, S13
T1, T2

Why Choose Relentless Chassis?

1. All codes covered – light, heavy, trailer, and custom.
2. Full service – fabrication, design, testing, certification.
3. 100% road-legal – every build leaves with engineering approval and a QLD mod plate.
4. No limits – from hot rods to 4x4s, trucks to trailers, we do it all.