Sale

Exhaust› Headers, Manifolds and Components

PPE Engineering

4-1 Stainless Steel Headers

$1,994.99 $1,548.11 Save $446.88

SKU: 1140004-SS

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The PPE Engineering Lexus SC400 headers are a 4-1 design featuring 1 5/8" runners and a 2.5" outlet. Constructed from 100% 304 stainless steel, these headers are designed for enhanced performance.

These headers offer power gains of 18-20 whp and 20+ ft-lb. They are a bolt-on installation and do not require O2 sensor extensions. However, they are not a direct fit to stock catalytic converters and require minor fabrication for installation.
Show original supplier description
The PPE Engineering Lexus SC400 headers are a performance-oriented exhaust component designed to improve engine breathing and power output. These headers feature a 4-1 design with 1 5/8" primary runners that smoothly transition into a 2.5" collector outlet, all constructed from durable 100% 304 stainless steel for longevity and corrosion resistance. Engineered to provide significant performance improvements, these headers are claimed to deliver 18-20 wheel horsepower and over 20 ft-lb of torque. The installation is designed as a bolt-on, and importantly, does not require O2 sensor extensions, simplifying the process. New outlet gaskets are included to ensure a proper seal. It is crucial to note that these headers are not a direct fit to the stock catalytic converters. The design is longer than the factory manifolds, and installation necessitates minor fabrication. Users will need to modify their stock catalytic converters, opt for high-flow catalytic converters, or create custom test pipes to properly integrate these headers into the exhaust system. Matching flanges for exhaust modification are available separately. For those seeking to reduce underhood temperatures and maintain aesthetic appeal, an optional ceramic coating is available. This coating not only helps dissipate heat but also preserves the headers' appearance over time.

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 Number1140004-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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