SLR McLaren (2004-2011)
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RENNtech HHT-Hand Held Tuner | ECU Upgrade | R199 | SLR McLaren | 675 HP / 646 LB-FT | M155 | 5.5L V8 Supercharged
The RENNtech ECU Plus Upgrade brings the SLR McLaren up to 675 HP and 646 LB-FT | Gains: +47 HP and +25 LB-FT.