Was bored browsing the jaguar forum (same engine, after all) and came across this recent thread announcing aluminum crossover pipes.
I've never heard of the vendor, but interesting nonetheless... it does claim fitment on the LR4 SCV6

Aluminum Cooling Pipes - Finally!! - Jaguar Forums - Jaguar Enthusiasts Forum
F-Type ( X152 ) - Aluminum Cooling Pipes - Finally!! - I just saw this today and everyone of us Jag guys should be jumping for joy!! The aftermarket has finally redone the terrible plastic cooling tubes at the front of the engine. They look great and at $250 for both. I think a pretty fair price...
www.jaguarforums.com
I've never heard of the vendor, but interesting nonetheless... it does claim fitment on the LR4 SCV6

Jaguar Land Rover Engine Upgraded Metal Coolant Crossover Pipe 3.0 V6 5.0 V8 S/C | eBay
This Engine Coolant Pipe doesn’t fit the Naturally Aspirated 5.0 Engine Jaguar F-Type, F-Pace, XE, XF, XJ, XK & more. Land Rover Range Rover, Range Rover Sport, LR4, Discovery, Defender & more. High-Quality Car Parts for Your Jaguar / Land Rover.
www.ebay.com
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