Renntech Mercedes SL65 Black

661bhp not enough for you? Renntech's upgrade takes the twin turbo SL65 AMG past 800bhp.

US Mercedes specialist Renntech has created a 144bhp upgrade for the Mercedes SL65 Black.

The ‘Renntech Performance Package 1’ uses a revised ECU, dual intercoolers for the bi-turbo V12 and a sports exhaust to boost the cars power output by 144bhp to 805bhp. Headlining the standard car’s stats was the fact it produced 1000Nm (that’s 738lb ft in old money), however the modifications now round the figures up to a nice, wholesome 1000lb ft (1356Nm). 

Obviously, deploying 1000lb ft to the tarmac via the rear wheels is easier said than done. To give the Renntech SL65 a fighting chance of not being overwhelmed by physics, Renntech has included a transmission upgrade in the package. A limited-slip diff with the ability to range from open to 100 per cent locked is deployed between the rear wheels to help keep the power in check.

VIDEO: Watch the standard SL65 tackle the Millbrook bowl at 180mph

Renntech are yet to provide any revised performance figures for the £10,700 upgrade (minus the diff), but as the SL65 Black was no slouch in stock trim, performance is likely to be ‘rapid’. Of course if you don't want to go to Renntech to have your SL65 tuned, you could always try Brabus.  

Read what happened when the SL65 met the mighty Aston Martin Vantage 600

 

 

Recommended

2021 Mercedes-Benz SL spied before debut later this year
Mercedes SL spy 2021 - front quarter
Mercedes SL

2021 Mercedes-Benz SL spied before debut later this year

Merc’s all-new SL convertible has been spied again flaunting its compact new body
11 Jan 2021

Most Popular

TOM’S Racing Toyota GR Yaris revealed – homologation special gains focus
TOM’S Racing Toyota GR Yaris front
Toyota GR Yaris

TOM’S Racing Toyota GR Yaris revealed – homologation special gains focus

Japanese racing outfit TOM’S becomes the latest firm to mod the new Toyota GR Yaris
20 Jan 2021
'Traction control, ABS, airbags, lights, – one press of a button and they're all off. We're better off without them'
Richard Porter opinion
Opinion

'Traction control, ABS, airbags, lights, – one press of a button and they're all off. We're better off without them'

The Common Sense Car offers a glimmer of hope for British sports car lovers
19 Jan 2021
BMW M8 Competition Gran Coupe vs Audi RS7 Sportback – battle of the alt-supersaloon
Audi RS7 vs M8 Comp GC - cornering
BMW

BMW M8 Competition Gran Coupe vs Audi RS7 Sportback – battle of the alt-supersaloon

BMW's grandest of M8 Competition Gran Coupes takes on our impressive fast-fleet Audi RS7
16 Jan 2021