If you follow the aftermarket community, the past couple of years have been absolutely wild with companies like Heffner and Underground Racing taking already radical vehicles and turning the dial up to "11" like in This Is Spinal Tap.
One of those tuners is Hennessey, most famous for the work its done to American vehicles. As of late though it's been thinking outside the box working on cars like the Ferrari 458 Italia and now the McLaren MP4-12C.
With the MP4-12C, Hennessey has taken the 3.8-liter bi-turbo V8 and pushed power from 616 hp to 704 hp and torque gets a bump as well. While the upgrade list isn't anything tremendously crazy — software, intercooler, air filters, new exhaust system — it's more than enough to keep it up to speed with the Hennessey'd 458 Italia.
Below you'll find a clip of a stock MP4-12C so we can only imagine what the new exhaust makes the McLaren sound like!
...The Hennessey HPE700 sees the 12C’s 3.8-litre twin-turbo V8 engine tweaked from 616 to 704bhp, just short of the 727bhp that McLaren has pushed out of the P1's petrol engine, while torque climbs from 442 to 538lb ft. This enables a performance improvement, 0-60 now taking 2.8sec (down from a claimed 3.1sec) while the quarter mile is completed in 10.3sec at 137mph. There’s no mention of the Hennessey McLaren’s top speed, but expect a small improvement over the standard 12C’s 207mph.
The upgrade comes courtesy of an ECU software upgrade, an intercooler upgrade, new air filters and a stainless steel exhaust system...