Dinan High-Performance Heat Exchanger – BMW G20/G22/G26/G29/G42 & Toyota GR Supra (B48/B58) #D780-0003

OVERVIEW

Dinan's high-performance heat exchanger is a direct-fit replacement for the factory charge-air heat exchanger on G-chassis B48/B58 cars and the B48/B58-powered Toyota GR Supra, built with a thicker bar-and-plate core and more surface area to pull more heat out of the charge air under sustained load.

This G-chassis/Supra unit (D780-0003) uses a 45mm core versus the OEM 26.75mm core, 68% more surface area, and has recorded charge air temperatures nearly 12°F lower than stock, with full-size end tanks.

SPECS

• 45mm core vs. 26.75mm OEM core
• 68% more heat transfer surface area than stock
• Up to nearly 12°F charge air temperature reduction recorded vs. stock
• Full-size end tanks
• 100% TIG-welded aluminum, bar-and-plate construction, pressure tested
• Direct-fit replacement using factory mounting points
• Fits both RWD and xDrive drivetrains

PARTS INCLUDED

• One (1) Dinan D780-0003 high-performance heat exchanger

TECH RESOURCES

Additional Parts Required

• None officially specified by Dinan. See Notes below for a fitting caveat some installers report.

Installation

• Dinan installation instructions – D780-0003 (G-chassis/Supra heat exchanger)

Notes

• Some installers report needing an OEM-spec O-ring (22mm ID x 29mm OD) for a secure fitting connection — not included with this kit, sold separately by BMW.
• This listing was split out from a previously bundled Dinan Engine Hardware listing that combined multiple unrelated part numbers as variants of one product; this SKU (D780-0003) now has its own standalone listing.

PART NUMBER

• D780-0003 — High-Performance Heat Exchanger, G-Chassis/Supra B48/B58

VEHICLE APPLICATIONS