3Uz Swap Brz Real vs Virtual: Can You Actually Fit a Lexus V8 into a Brz?
By Chloe Bennett
The first hurdle is raw physical dimension. Subaru designed the BRZ chassis specifically around the FA20 boxer configuration. The stock boxer engine measures barely 18 inches high, allowing engineers to pin the hood line ultra-low and position the front crossmember directly beneath the engine block.
The Lexus 3UZ-FE is fundamentally different. It is an all-aluminum 90-degree V8 utilizing massive 32-valve double overhead camshaft (DOHC) cylinder heads. From cam cover to cam cover, the 3UZ spans approximately 28.4 inches in width and roughly 26 inches in total height.
When you lower the 3UZ between the BRZ strut towers, two immediate physical interferences emerge:
- Strut Tower Proximity: The expansive DOHC cylinder heads push uncomfortably close to the unibody sheet metal. Servicing valve cover gaskets or spark plugs once the motor is seated becomes an engine-out exercise unless you trim the inner structural lips.
- Steering Column Interference: The BRZ uses an electric power steering (EPS) assembly with an intermediate shaft passing tightly along the driver's side frame rail. The bank two exhaust manifold of the 3UZ directly collides with this shaft. Custom tubular exhaust manifolds or a modified steering column universal joint are mandatory.
Compared to a pushrod Chevy LS engine, which relies on a single in-block camshaft and compact cylinder heads, the 3UZ engine is significantly wider at the top. Fabricators attempting a Toyota 86 FA20 replacement quickly realize that overhead-cam V8s demand twice the packaging ingenuity of their domestic American pushrod counterparts.
Chloe Bennett explores the intersection of pop culture, streaming entertainment, digital trends, and contemporary lifestyle. Her weekly commentary reaches thousands of culture enthusiasts.
