Porsche 991 Piston Set - Mahle - Forged - 6cyl - '14-'19. A direct-fit, forged piston set engineered for the 3.8L turbo flat-six used in Porsche 991 applications from 2014–2019. Built by Mahle to OE-related dimensions for reliable fitment and durability.

This set is designed for enthusiasts and builders who need OEM-correct geometry with the strength of forged pistons. The pistons are specified for a 102mm bore with a 77.5mm stroke, 138mm rod length, and 23mm wrist pin. The pistons feature a -7.6cc dish resulting in an approximate 9.0:1 compression ratio as supplied. Forged construction provides improved fatigue resistance over cast designs, and the dimensions match the 3.8L Turbo specification to simplify installation and engine assembly.

Features

• Mahle forged pistons sized for 102mm bore
• Designed for 3.8L Turbo (991) — 77.5mm stroke / 138mm rod
• 23mm wrist pin diameter and -7.6cc dish (nominal 9.0:1 CR)
• Direct-fit geometry for 2014–2019 Porsche 991 applications
• Manufactured to tight tolerances for consistent assembly

If you have questions about fitment, machining, or compatibility with your build, call us directly — we're happy to help: 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations (Austin, Texas and the Los Angeles, California area) where we offer installation and customization services and can assist with engine assembly and clearances.

If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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