DESCRIPTION
Upgrade charge-air piping with the do88 Intercooler Piping Kit. TR-390 fits BMW Z4 M40i G29 / Toyota GR Supra A90.
Upgrade your engine with the do88 charge pipe kit for B58 Gen 2 found in Toyota Supra A90 and BMW Z4 M40i!
The B58 Gen 2 engine is excellent but has a known reliability issue: the stock charge pipe. This pipe can break even on stock cars during track sessions. If you're planning tuning, upgrading the charge pipe beforehand is highly recommended.
Most aftermarket B58 charge pipe kits are not properly designed. Many use two pipes joined by a straight reducing silicone hose, which does not handle thermal expansion/contraction well. This often causes the hose to pop off. Over-tightening clamps usually damages the pipes.
At do88, we use a flexible aramid-reinforced silicone hose with 3 humps, allowing movement in any direction without stressing the connections. Pipes feature CNC-machined 6063 hose ends with 3mm wall thickness, preventing deformation even under overtightened clamps.
Our charge pipes also improve performance. The lower pipe measures 60mm (2 3/8”;) and the upper pipe 76mm (3”;), with smooth mandrel bends to reduce pressure drop and turbulence. The upper pipe connects to the throttle body via a CNC-machined flange and includes two 1/8 NPT ports for methanol injection or boost pressure sensors. Two 1/8 NPT plugs are included for unused ports.
Features:
- Flexible hose connection between upper and lower pipes prevents hose from popping off.
- 3-humped silicone hose reinforced with high-temperature aramid fabric and stainless-steel rings.
- High-quality Mikalor hose clamps with inner rings to protect the hose and distribute clamp pressure evenly.
- Improved airflow and reduced backpressure.
- 27% more flow than OEM: 558 CFM @ 150 mbar (2.17 psi) vs OEM 439 CFM.
- CNC-machined hose connections matching pipe inner diameter for safe clamping.
- CNC-machined MAP sensor boss, turbo, and throttle body connections.
- CNC-machined (2x) 1/8 NPT ports for methanol injection or boost pressure sensors.
- Two 1/8 NPT plugs included if ports are unused.
- Mandrel-bent 60mm (2 3/8”;) and 76mm (3”;) charge pipes with black powder coat finish.
- No interference with the engine cover.
- Complete hardware and instructions included for installation.
OE / Part Numbers:
13718651066
Vehicle Fitment:
Model: Toyota GR Supra MK5 (A90)
Engine: B58 Gen 2
Model years: 2019–
Model: BMW Z4 M40i (G29)
Engine: B58 Gen 2
Model years: 2017–
TECHNICAL DETAILS
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