Description
Aeroflow GM TH350 & TH400 Transmission Cooler Adapters (-8AN to 1/4″ NPSM)
Upgrade your GM transmission cooling system with high-flow AN plumbing using this precision-machined adapter pair from Aeroflow Performance.
Overview
Designed specifically for GM Turbo-Hydramatic 350 (TH350) and Turbo-Hydramatic 400 (TH400) gearboxes, the Aeroflow AF375-08BLK adapter fittings allow seamless conversion from standard 1/4″ NPSM transmission cooler ports to high-performance -8AN braided lines. Constructed from premium grade 6061-T6 billet aluminium with a sleek black anodised finish, these adapters ensure maximum flow rate, superior corrosion resistance, and leak-free fluid transfer under high pressure and temperature conditions.
Each set is supplied as a pair complete with high-purity copper sealing washers, eliminating the risk of thread distortion or case fluid leaks inherent in standard tapered NPT fittings.
Key Features
- ☑ Direct Fitment: Tailored for GM TH350 and TH400 automatic transmissions.
- ☑ AN Line Plumbing: Converts 1/4″ NPSM straight threads to male -8AN flare fittings.
- ☑ Billet Construction: Machined from high-strength 6061-T6 aluminium for durability.
- ☑ Corrosion Protection: Durable black anodised finish for a clean, stealth engine bay look.
- ☑ Complete Pair Kit: Includes 2 x adapters and 2 x copper sealing washers for a complete installation.
Technical Specifications
| Manufacturer | Aeroflow Performance |
|---|---|
| MPN | AF375-08BLK |
| Thread Size A | 1/4″ NPSM Male (Straight Pipe Thread) |
| Thread Size B | -8AN Male Flare |
| Transmission Fitment | GM TH350 / TH400 |
| Material | 6061-T6 Billet Aluminium |
| Finish | Black Anodised |
| Quantity | Pair (2 Pieces) |
What’s Included in the Box
- 2 x Aeroflow AF375-08BLK 1/4″ NPSM to -8AN Adapters (Black Anodised)
- 2 x Sealing Copper Washers
Engineered to strict motorsport standards by Aeroflow Performance, these transmission adapters provide an essential link in high-performance drivetrain cooling setups. Order from JP Racing today for fast UK delivery, comprehensive technical assistance, and dedicated customer care.




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