24-25 Ford F-150 3.5L Ecoboost SPD Performance 35F24SS Alpha Catted Downpipes

SPD Performance 35F24SS Alpha Catted Downpipes – Part Number: 35F24SS (for 2024–2025 Ford F‑150 3.5L EcoBoost)

This high-performance catted downpipe system delivers unmatched airflow and efficiency for the 2024–2025 F‑150 equipped with the 3.5L EcoBoost. Designed to overcome Ford’s restrictive factory downpipes, which reduce primary catalytic diameter to 5", this Alpha Catted solution expands to 3" mandrel‑bent tubing, minimizing back‑pressure and turbo lag, lowering exhaust gas temperatures, and boosting throttle response, fuel mileage, and overall performance. Built with precision CNC‑laser‑cut 1/2" 304 stainless turbo flanges and durable TIG & MIG welds, it’s engineered for long‑term reliability. The integrated 4" flex section absorbs engine and chassis movement. This direct bolt‑on component requires no custom tuning and functions as a complete replacement. Made in the USA, the catalytic converters support racing applications while maintaining compliance. (User is responsible to check local regulations.) 

Key Features

• Industry‑first SPD Alpha ultra high‑flow catalytic converters

• 3" diameter mandrel‑bent 304 stainless tubing for boosted flow

• CNC laser‑cut thick‑flange turbo connections & v‑band seals to eliminate leaks

• 4" flex pipe for shock absorption due to movement and chassis flex

• EPA‑approved federal emissions cats that do not trigger check engine lights

• Direct bolt‑on design, no tuning required

Benefits

• Significantly improved throttle response and turbo spool time

• Lower exhaust gas temperatures and reduced turbo lag

• Enhanced fuel efficiency under real‑world driving loads

• Maintains compliance with emissions regulations (verify by state/county)

• Built to last with high‑grade 304 stainless and professional welding

• Comes with quality assurance backed by manufacturer warranty coverage

Product Specs

• Size: 3" internal diameter tubing; includes 4" flex section

• Material: 304 stainless steel tubing and flanges

• Catalyst: SPD Alpha 500‑cell ultra‑high‑flow converters (extra rhodium/platinum loading)

• Finish: Polished stainless steel

• Seal: High‑grade v‑band clamps

• Weight: approximately 25 lbs

Install Difficulty Level

Installation is described as light to moderate mechanical skill, with most experienced DIYers or professionals able to complete in approximately 1 hour using standard hand tools and factory mounting points. The direct bolt‑on nature and factory‑matching geometry make installation straightforward and hassle‑free.

Vehicle Fitment

Vehicle Fitment
This part fits Ford F‑150 models from 2024 and 2025 equipped with the 3.5L EcoBoost engine. It replaces the stock downpipes directly without modification.

For any questions or if product description needs correction, please contact the MPT Performance experts at (407) 636‑7077 or by email.