Equal Length 4-1 Parallel Merge Collector Headers

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Exhaust› Headers, Manifolds and Components

PPE

Equal Length 4-1 Parallel Merge Collector Headers

Name: Equal Length 4-1 Parallel Merge Collector Headers
Brand: PPE
SKU: 145001-SS

$5,137.25 $3,880.00 Save $1,257.25

SKU: 145001-SS

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Overview

The PPE equal length headers are a performance exhaust component designed for Lexus RCF, GSF, and IS500 models. Constructed from 16-gauge 304 stainless steel with TIG-welded joints, these headers feature a 4-1 parallel merge collector to improve exhaust flow and engine efficiency.

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The PPE equal length headers are designed to replace factory exhaust manifolds on Lexus RCF, GSF, and IS500 models, offering improved flow and volumetric efficiency through optimized runner lengths and diameters. Each unit features 16-gauge 304 stainless steel tubing that is fully TIG-welded, including 3/8-inch thick head and outlet flanges, and a 15-degree parallel merge collector for consistent gas pulse expulsion. This design helps balance backpressure at the exhaust ports to aid top-end engine performance. Installation requires attention to thermal management, as the manufacturer recommends either ceramic coating or the use of 2-inch wide titanium heat insulation. It is also advised to retain the factory heat shield to protect the starter motor. These headers are intended for racing applications and do not include factory catalysts; consequently, they are not intended for use on public streets or roadways. The package includes new 60mm outlet gaskets and a dipstick relocation bracket. Because these headers remove factory emissions equipment, appropriate software calibration or an ECU tune is strongly recommended to support the performance changes. RR Racing, a distributor, offers an optional ECU upgrade tune package alongside this product to maximize power gains.

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.

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Specifications

Brand	PPE
Part Number	145001-SS
Category	Exhaust

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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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