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We are now going into production with our new 200 Cell Sport Catalysts for the XJ X351. So far we have fitted to 5.0L SC test car. I'm certain that the 5.0 normally aspirated fitment is the same, and based on the identical architecture & mounting for the 3.0L cars, we believe these will fit also.
We are offering these parts for the next on a 'pre-buy' special for the first 10 pieces, $950, down from $1295.
I should have V8 sound clip and dyno shortly. Based on similar projects with Aston's engines which we have dyno tested, I would expect to see gains IRO 15-18BHP on V6 Engines, and upwards of 20BHP on V8 Engines. For those of you that already like the tone of your exhaust or like the active exhaust option, but want more power & sound this is a great way to go!
If you would like to place an order at the discounted price, email me at Stuart@VelocityAP.com to reserve a set before they are all gone
It is pretty straightforward. 2 Bolt flanges on the manifold side, and a slip-joint on the exhaust side. 2 O2 sensors to swap. It is all very accessible.