ICP BMW N54 Downpipe (Z4 35i/35is – E89)

The ICP BMW N54 Downpipe is designed for the E89 Z4 35i/35is, unlocking performance by improving exhaust flow and turbo efficiency. With tuning, this upgrade delivers strong horsepower gains, improved spool response, and a deeper exhaust note.

Constructed from 304 stainless steel with TIG welds and CNC-machined flanges, the ICP N54 Z4 Downpipe ensures durability and OEM-like fitment. Both catless and catted versions are available, each with an integrated heatshield.

Fitment:

• BMW Z4 35i (E89) 2009–2016
• BMW Z4 35is (E89) 2010–2016

Key Features:

• Designed for BMW N54 twin-turbo inline-6 (E89 Z4)
• Available in catless or catted with heatshield
• Gains of +30–40 HP with ECU tune
• Sharper spool and enhanced exhaust sound
• Direct bolt-on install