CNC Ported Heads, M156
PRODUCT DESCRIPTION Weistec Engineering offers the one and only CNC port solution for the M156 engine platform. Utilizing state of the art technology in CAD digitizing and analysis, Weistec Engineering has created the most consistent, and efficient method of port technology for the M156 engine platform. This proper port design nets a significant increase in laminar intake, and exhaust air flow. Key Features: 5-axis CNC machined 397.88 CFM Intake flow 257.81 CFM Exhaust flow Fully assembled, Ready to run heads Notes: Core exchange must be sent with order. An $8700 core supplement will be charged with no core exchange. Typical lead time is 7-8 business days. ECU tuning is recommended for optimal power gains. All heads are assessed to ensure deck clearance and valve lineup. Chamber size and compression is not effected by CNC Port. (Compression stays at factory spec) Vehicle Fitment Matrix: YEAR MAKE MODEL TRIM ENGINE 2011 MERCEDES-BENZ SL63 AMG BASE (R230) NA 6.2L V8