This is NOT a guarantee, only a guide to help make the best decision to be check engine light free and not require tuning.
Newer 2023+ cars CAN have updated 02 Sensor tolerance calibrations that may or may not change the outcome.
When wanting to be check engine light free and not tune using the LARGEST catalyst possible is recommended.
This list will be updated regularly.
Catalyst CEL Free Guide Video and Cat Information
Acura:
- NSX – HJS 130mm, Gesi GEN2 5”
Alfa Romeo:
- Giulia QV – HJS 130mm, Gesi GEN2 5”
- Stelvio QV – HJS 130mm, Gesi GEN2 5”
Aston Martin:
- Vantage 4.0 - HJS 130mm, Gesi GEN2 5”
- DB11 4.0 - HJS 130mm, Gesi GEN2 5”
Audi:
- C7/D4 4.0t - HJS 121mm, Gesi GEN2 4.5”
- B9 S4/S5/SQ5 – Gesi GEN2 6”
- B9 RS4/RS5 – Gesi GEN2 5”
- Q7/Q8 E839 3.0t Single Turbo - Gesi GEN2 6”
- C8 A6/A7 – Gesi GEN2 6”
- C8 S6/S7 - HJS 143mm, Gesi GEN2 5”
- C8/D5 RS6/RS7/S8 – HJS 130mm, HJS 143mm, Gesi GEN2 5", Gesi GEN2 6”
- RSQ8/SQ8/SQ7 – HJS 143mm, HJS 130mm, Gesi GEN2 5", Gesi GEN2 6”
Bentley:
- Bentayga 4.0L– HJS 143mm, HJS130mm, Gesi GEN2 5”, Gesi GEN2 6”
- Continental GT/Flying Spur – Gesi GEN2 5”
BMW:
- G80 M3/M4 – HJS 121mm, Gesi GEN2 4.5”
- X3M/X4M – HJS 121mm, Gesi GEN2 4.5”
- F90 M5 – HJS 130mm, Gesi GEN2 5”
- F10 M5/M6 F12 F13 F06 - HJS 121mm, Gesi GEN2 4.5”
- E70/71 X5M/X6M - HJS 130mm, Gesi GEN2 5”
- F85/86 X5M/X6M - HJS 130mm, Gesi GEN2 5”
- F95/96 X5M/X6M – HJS 130mm, Gesi GEN2 5”
- M8 – HJS 130mm, Gesi GEN2 5”
- M50i/S63 – HJS 130mm, Gesi GEN2 5”
- M60i/S68 - HJS 130mm, Gesi GEN2 5”
- B58 - HJS 130mm, Gesi GEN2 5”
Ferrari:
- 296GTB - HJS 143mm
- F8 Tributo – HJS 130mm, Gesi GEN2 5”
- F12/812 - HJS 130mm, Gesi GEN2 5”
- 488 – HJS 130mm, Gesi GEN2 5”
- SF90 - HJS 130mm, Gesi GEN2 5”
Lamborghini:
- Aventador - Gesi GEN2 4.5”, HJS 121mm
- SVJ – Gesi GEN2 4.5”, HJS 121mm
- Urus – HJS 143mm, HJS 130mm, Gesi GEN2 5”, Gesi GEN2 6”
Maserati:
- MC20 - HJS 130mm, Gesi GEN2 5”
McLaren:
- 720S/750S/765LT – HJS 130mm, Gesi GEN2 5”
- 570/540/MP4-12C – HJS 130mm, Gesi GEN2 5”
- GT - HJS 130mm, Gesi GEN2 5”
Mercedes:
- M256 – HJS 143mm, Gesi GEN2 6”
- M276 – HJS 121mm, Gesi GEN2 4.5”
- M278 – HJS 121mm, Gesi GEN2 4.5”
- M133 – HJS 121mm, Gesi GEN2 4.5”
- M139mM139L – HJS 130mm, HJS 143mm, Gesi GEN2 5”
- M157 – HJS 130mm, Gesi GEN2 5”
- M176/177/178 – HJS 130mm, Gesi GEN2 5”
Porsche:
- 997/991 911 – HJS 130mm, Gesi GEN2 5”
- GT2RS - HJS 143mm, Gesi GEN2 5”
- 992 911 – HJS 143mm, Gesi GEN2 5”
- 992 Carrera – HJS 143mm, Gesi GEN2 5”
- Cayenne E839 3.0t Single Turbo - Gesi GEN2 6”
- Cayenne S 2.9L- Gesi GEN2 5”
- Cayenne Turbo/GT/S 4.0L- HJS 143mm, HJS 130mm, Gesi GEN2 5”, Gesi GEN2 6”
- Macan Turbo/GTS 2.9L- HJS 143mm, Gesi GEN2 5”
- Panamera 971 Turbo– Gesi GEN2 5”
Toyota:
- A90/91 Supra - HJS 130mm, Gesi GEN2 5”