Air and Fuel› Intake Manifolds and Components

CXRacing

Sheetmetal Aluminum Lower Intake Manifold

$754.64

SKU: IM-13BREW-4

Special Order
Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The CXRacing Lower Intake Manifold is a sheetmetal aluminum intake designed for the Mazda 13B REW Rotary Engine. It features 4 ports and is compatible with RX-7 FD models from 1992-2002. This manifold includes a CNC-made fuel rail and is TIG welded.

This kit includes the intake manifold, fuel rail, and accessories as pictured, but injectors are not included. It is intended for off-road or track use only.
Show original supplier description
The CXRacing Lower Aluminum Sheetmetal Intake Manifold is engineered for the Mazda 13B REW Rotary Engine with 4 ports, specifically for the RX-7 FD (1992-2002). This TIG-welded aluminum manifold features a CNC-made fuel rail designed for high horsepower setups, with an AN8 fitting to support large fuel flow. It accommodates BOSH top feed injectors and includes dummy plugs for optional configurations of 2, 4, or 6 injectors, making it suitable for Gasoline, E85, or Methanol fuels. The design incorporates equal length primary and secondary runners for improved airflow, especially under extreme boost and during spool-up. However, it explicitly does NOT fit the Cosmo Upper Intake. This product is intended for Off Road or Track Use ONLY and is NOT for Street Use. CXRacing advises that due to the complexity of engine swaps, users should ensure this application is correct for their project. The sale includes the intake manifold, fuel rail, and accessories as pictured; injectors are sold separately.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandCXRacing
Part NumberIM-13BREW-4
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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