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Exhaust› Headers, Manifolds and Components

PPE Engineering

304 Stainless Steel Exhaust Headers

$2,862.75 $2,433.33 Save $429.42

SKU: 155601-SS

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Overview

The PPE Engineering headers are high-flow performance exhaust manifolds designed to increase power in the Infiniti M56 and Q70. These headers feature mandrel-bent, TIG-welded 304 stainless steel tubing with a 4-1 or 3-1 parallel merge collector for improved exhaust flow compared to stock manifolds.
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The PPE Engineering headers are precision-engineered to replace restrictive factory manifolds, offering significant flow improvements for the Infiniti M56 and Q70 platforms. Constructed from durable 16-gauge 304 stainless steel and fully TIG-welded, these units are available with an optional black ceramic coating to help manage heat. They utilize increased tube diameters and optimized lengths, terminating in a ported 4-1 or 3-1 parallel merge collector to maximize power delivery. These headers are compatible with both RWD and AWD configurations. The kit is designed to be a bolt-on solution that connects to either the stock exhaust or a full 2.5-inch dual exhaust system with an X-pipe. Each set includes essential installation components, including outlet gaskets, hardware, and extension wires for the primary O2 sensors. Designed specifically for off-road use, these headers are not available with catalytic converters. For proper installation and optimal operation, customers should note that these systems are intended for track and race applications. They are backed by a one-year manufacturer warranty.

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

BrandPPE Engineering
Part Number155601-SS
CategoryExhaust
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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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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