21-24 Ford F-150 3.5L PowerBoost SPD Performance 35FPB21 Alpha Catted Downpipes

21‑24 Ford F‑150 3.5L PowerBoost Alpha Catted Downpipes (Part # 35FPB21)

The 2021‑2024 Ford F‑150 3.5L PowerBoost delivers serious hybrid performance, but factory downpipes bottle up power by shrinking the primary catalytic diameter—from 5.5″ down to 5″—which raises back pressure and exhaust gas temperatures. SPD Performance’s Alpha Catted Downpipes replace that bottleneck with a full 3″ mandrel‑bent stainless system featuring industry‑first 500‑cell (or higher) Rhodium‑loaded catalytic converters. This upgrade unlocks improved throttle response, reduced turbo lag and EGTs, better mileage, and horsepower gains without causing a check-engine light—all while still maintaining green emissions standards. Built in the USA with CNC laser‑cut 304 stainless flanges and TIG/MIG welds, the system is race-capable yet suitable for direct factory-style replacement—with no custom tuning required.

Key Features

• Ultra-high‑flow SPD Alpha catalytic converters (500‑cell, rhodium‑enhanced) for emissions compliance and maximum exhaust flow

• Full 3″ mandrel‑bent 304 stainless steel tubing for strength and durable performance

• CNC laser‑cut ½″ 304 stainless turbo flanges plus TIG & MIG welding for leak‑free, long‑lasting seal

• Integrated 4″ flex‑pipe to absorb engine movement and chassis flex

• Direct bolt‑on to factory downpipe location—no tuning required, no check engine lights (NO CEL)

• Proudly manufactured in the USA for race-ready quality

Benefits

• Enhanced engine performance with sharper throttle response and quicker turbo spool

• Lower exhaust gas temperatures and minimized turbo lag

• Improved fuel efficiency and smoother acceleration

• No check engine light triggers even under spirited or tuned use

• Backed by a manufacturer’s warranty for installation quality and material defects

Product Specs

• Size: Built for 2021‑24 Ford F‑150 3.5L PowerBoost turbo hybrid engines

• Material: 304 stainless steel tubing and flanges

• Color/Finish: Natural stainless, brushed/satin metallic

• Catalytic Core: SPD Alpha ultra‑high flow, 500‑cell (or greater), rhodium‑loaded

• Flex Section: 4″ stainless flex pipe incorporated

• Flanges: ½″ thick CNC laser‑cut V‑band flanges (304ss)

• Welding: TIG and MIG welded for strength and durability

• Origin: Made in the USA

Install Difficulty Level

Installation takes approximately 1 hour and is rated as light to moderate mechanical skill. The downpipes feature direct-fit factory alignment and bolt-on design—no cutting, welding, or tuning required—making it an easy upgrade even for DIY enthusiasts.

Vehicle Fitment

Compatible with the following vehicles: 2021, 2022, 2023, 2024 Ford F‑150 equipped with the 3.5L PowerBoost hybrid V6 engine (PowerBoost/EcoBoost 3.5L). Does not fit Raptor models or V8 engines.

CARB Status

This part does not carry a CARB (California Air Resources Board) Executive Order (EO) number. As such, it is not legal for sale or use in the state of California or any other state adopting California emission standards. Please ensure compliance with local regulations before purchasing.

For any questions about fitment, emissions compliance, or to report product description inaccuracies, contact MPT Performance experts at (407) 636‑7077 or by email.