Air and Fuel› Superchargers, Turbochargers and Components

MMI Speed Shop

Street Demon Series 485HP Turbo Kit

$1,644.72

SKU: 255002964210

In Stock
In Stock
Ships by Jul 30
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Advanced — 4+ hours

Description

The MMI Speed Shop Street Demon Series 485HP Package is a comprehensive turbo kit designed for the 2012-2015 Honda Civic Si. This kit is capable of producing well beyond 485 horsepower at 25+ PSI with supporting modifications and a built motor. On a stock motor, it can provide a 50-100 horsepower gain at 8 PSI. The package includes a hybrid turbocharger, turbo exhaust manifold, front mount intercooler, universal intercooler piping, and a turbo oil line install package.

Fitment

Fitment Guaranteed

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMMI Speed Shop
Part Number255002964210
CategoryAir and Fuel

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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