The D4 was first released with the carryover engine choices of the 4.2L V8 and the 6.0L W12, later in production the 3.0T supercharged V6 and 4.0T twin turbo V8 were substituted. The 3.0T can be bumped up to 425 HP / 379 TQ with a simple stage 1 tune while the 4.0T goes to an amazing 530 HP / 586 TQ!