Diamond Eye Performance 4"/3.5" Cat-Back System

Name: Diamond Eye Performance 4"/3.5" Cat-Back System
Brand: Diamond Eye Performance
Price: 440 USD
Availability: InStock

Fits 2011-2014 3.5L EcoBoost

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gain

4-18 hp / 5-18 tq

est. from comparable claims

price

$440

at Dale's Super Store

5% below its 35-day average on this site

low $440 · high $574.99 since Jul 12, 2026

install

2/5 difficulty · n/a

Buy at Dale's Super Store→

also at Stage 3 Motorsports

where to buy · 2 retailers tracked

Dale's Super Storebest pricechecked Aug 20$440view
Snake River Performancechecked Aug 9 · out of stock$574.99view

Diamond Eye's 4-inch/3.5-inch cat-back system for 2011-2014 trucks.

why this one — The listing states this isn't CARB-legal - if you're in California or another CARB state, run this by an attorney or check your local emissions rules before buying.

heads up

Listing states not CARB-legal.

Questions about this category

F-150: does anyone publish a horsepower number for a cat-back exhaust?F-150: what does a cat-back exhaust cost?F-150: how hard is it to install a cat-back exhaust, and how long does it take?

pairs well with

cp-e QKspl Catted Downpipe - High Flow (3.5L EcoBoost)

Gain shown is a no published number, not a guarantee. Price is a list price and can lag the retailer; confirm at checkout. See our affiliate disclosure.