Blow Off Valve GLC63 | YPG Motorsport X4 M40i "text":"The M178 Ported Heads is

"text":"The M178 Ported Heads is $6500

Throttle control — independent pedal response adjustment

restrictive OEM ducts

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Stage 3 turbocharger upgrade engineered for the Mercedes-AMG M178 4

Blow Off Valve GLC63 | YPG Motorsport X4 M40i "text":"The M178 Ported Heads isHigh performance blow off valve for the Mercedes AMG GLC63 M177 4. 0L twin turbo V8. Direct bolt on replacement for the factory recirculating valve delivers a sharp, aggressive blow off sound every time you lift off the throttle while maintaining proper turbo spool and perfect daily drivability. CNC machined in house from billet 6061 T6 aluminum for maximum durability under sustained boost pressure. The adjustable spring preload lets you fine tune