Dinan's Cold Air Intake for the BMW G29 Z4 M40i and Toyota GR Supra B58 reworks the entire lower airbox — not just the lid — to maximize use of available engine bay space and house a 40% larger custom filter. A secondary inlet with patterned openings on the opposite side from the engine adds airbox volume without raising turbo inlet temperatures, a result Dinan confirmed across single and multiple gear pulls, constant-speed runs, and 0–100 mph pulls. The lid includes a brace valley to accommodate factory braces or optional Dinan strut braces.
Features:
- 13 WHP and 14 lb-ft of torque gain on a completely stock vehicle
- 40% increase in filter area (stock: 82 in², Dinan: 115 in²)
- 60% larger airbox volume than stock
- Outflows factory intake by 58% or more
- Secondary patterned inlet adds volume without increasing turbo inlet temps
- Lid brace valley accommodates factory and optional Dinan strut braces
- Improved throttle response and sportier intake sound
- Bolt-on installation
- Fits BMW G29 Z4 M40i (2019–2026) and Toyota GR Supra A90/A91 B58 (2020–2026)