aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L

SKU: AFE48-46201

Headers

AFE Headers...

Afe

aFe Twisted Steel Header SS-409 HDR Jeep Wrangler YJ 91-99 I6-4.0L

SKU: AFE48-46201

Headers

AFE Headers...

LAST ONE! Est Ship 3-5 days. LAST ONE! This is the last unit at our distribution centre. Contact us if you need more. The ETA is the approximate time required to prepare your order for dispatch.

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Description

The new Twisted Steel performance header from aFe Power is redefining the header industry with new pulse control technology. aFe engineers have designed this header using optimum tube lengths and mitered collectors for maximum flow and velocity for power delivery across the entire power band. Combine with a large 1/2" thick head flange and 14-gauge 409 stainless steel tubing, you have a header that is strong and powerful. Twisted Steel headers are 100-percent bolt-on with no modifications necessary and are proudly engineered and built in Corona, CA.

Product Overview

aFe Power’s new Twisted Steel header delivers more horsepower and torque while outflowing the factory exhaust manifold. The header is constructed of 14-gauge 409 SS tubing with a 1/2” thick head flange to ensure a leak free seal. To eliminate dead space that can cause turbulence and hindering flow that formed collectors are prone to produce, a true merged collector and optimized tube lengths are used for true pulse control technology improving flow and performance. 100% hand TIG-welded construction ensures optimal strength and durability. The smooth curves and increased diameter of this header helps remove restriction and keeps exhaust gas flowing smoothly for improved performance and durability on and off the trails. All components are supplied for a hassle-free installation with no modifications necessary.

Features and Benefits

TIG Welded Construction
Retains All OE Emission Components
Optimized Primary Tube Lengths
CNC Mandrel Bends
Pulse Control Technology
Limited Lifetime Warranty

Product Details

Application:	Automotive
Coating/Finish:	Stainless Steel
Collector Tube Size (in.):	OEM
Collector Tube Size:	OEM
Description:	Twisted Steel 409 Stainless Steel Short Tube Header
Engine Make/Size:	Mopar 4.0L
Material:	409 Stainless Steel
Part Number:	afe48-46201
Port Shape:	Same As Port/Can Be Matched
Tube Diameter:	1.5
Tube Direction:	Up Swept
Tube Size:	1.5
WARNING CA Proposition 65 Message:	WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
WARNING CA Proposition 65:	Yes

Application Summary

Jeep Wrangler (YJ/TJ) 91-99 L6-4.0L

Part Type

Exhaust Header

Data: v4.2 - Upd: 2026-10-13 21:27:04

Features

CNC Mandrel Bends
Limited Lifetime Warranty
Optimized Primary Tube Lengths
Pulse Control Technology
Retains All OE Emission Components
TIG Welded Construction

Specifications

Product Attributes - Brand: AFE Power
Product Attributes - Manufacturer's Part Number: 48-46201
Product Attributes - Part Type: Headers
Product Attributes - Product Line: aFe Twisted Steel Headers
Product Attributes - UPC: 802959480021
Product Attributes - Header Style: Tri-Y one-piece
Product Attributes - Header Material: 409 stainless steel
Product Attributes - Primary Tube Outside Diameter (in.): 1 1/2 in.
Product Attributes - Header Color: Natural
Product Attributes - Flange Style: Standard
Product Attributes - Weld-Up: No
Product Attributes - Collector Attachment: 2-bolt flange
Product Attributes - Collector Reducers Included: No
Product Attributes - Tuned: Yes
Product Attributes - Primary Tube Gauge: 14-gauge
Product Attributes - Flange Thickness (in.): 0.50 in.
Product Attributes - Bolts/Studs Included: No
Product Attributes - Gaskets Included: Yes
Product Attributes - Crossover Pipe Included: No
Product Attributes - Catalytic Converter(s) Included: No
Product Attributes - Motor Mounts Included: No
Product Attributes - Transmission Mount Included: No
Product Attributes - Quantity: Sold as a kit.
Product Attributes - CARB EO Number(s): D-550-12
Product Attributes - Emissions: California EO Approved

Reference Information

Brand Name/s	Afe
StreetFX SKU	afe48-46201
SFX Item ID	4371808
Supplier Item Code	4371808
Manufacturer SKU	48-46201
Manufacturer UPC	802959480021
Alternative References	SS-409, I6-4.0L