In my opinion, it depends on the year of your Raptor. The catch cans have a value prior to 2017 after that, ford put dual fuel injection on the 3.5 ecoboost that keeps the valves washed.
from wiki:
3.5 L (D35; second generation) [edit]
The second generation 3.5L EcoBoost V6 (codename D35) was introduced for the
2017 Ford GT, revealed at the 2015 Detroit Auto Show in January, as well as the 2017 F-150, 2018 Expedition and 2018 Navigator.
[86] It produces up to 647 hp (482 kW)
[87] paired with a seven-speed
semiautomatic transmission. This engine replaces the 5.4 L supercharged modular V8 from the last generation
Ford GT. The GT was on an 11-year hiatus and returned in 2016 for the 2017 model year.
Also announced at the 2015 Detroit Auto Show was the 2017
Ford F-150 SVT Raptor, which is powered by an all-new 3.5 L twin-turbocharged EcoBoost V6.
[88] This new engine will produce 450 horsepower in the Raptor, up from the previous
6.2-L V8's 411.
The same second-generation 3.5L V6 is replacing the first-generation engine in the 2017 F-150 line-up. It will be standard on the F-150 Limited and remain an optional upgrade for other trim levels. Paired with the second-generation 3.5L EcoBoost V6 is the new 10R80 10-speed automatic transmission that was co-designed with GM. This new transmission will be outfitted on all second-generation 3.5L V6 EcoBoost F-150s. The 10-speed will be exclusive to the 3.5L EcoBoost engine in F-150s for the 2017 model year.
Changes from previous generation[edit]
The most prominent change is the addition of port fuel injection, while keeping the direct injectors. The port fuel injection was partly added due to the fuel output needs on the 3.5L HO Raptor engine, but also has several benefits for the 3.5L EcoBoost. It will prevent buildup on the intake valves and keep them clean due to fuel passing over the valves. Under certain engine conditions such as low rpm and low loads the high-pressure fuel pump and direct injection system will turn off and the engine will only use the port fuel injection, reducing efficiency losses due to the
HPFP. Both systems will operate at cold start, which will reduce emissions that direct injection suffers due to cold cylinder walls and lower fuel atomization.
Turbocharger changes include electronically actuated wastegates, turbine wheels now made with lighter Mar-M-247 super-alloy increasing responsiveness, and the same 51 mm turbine wheels but with sharper vane angles allowing between 2.5 psi (0.17 bar) and 16 psi (1.1 bar) higher boost. The turbochargers continue to be supplied by Borg Warner.
The cam drive system changed from a single primary chain to a stronger two primary chain system with separate chains driving each cylinder bank. In addition to dual primary chains, the side plates on the chains were also thickened. The cam chain drive sprocket on the crankshaft is a double gear arrangement to drive the two primary chains. These two changes were done to improve the harmonics, and are also stronger to help minimize the chain stretch that can occur over time on the 1st generation 3.5L EcoBoost.
The camshafts were made hollow for weight savings, along with the addition of a roller-finger follower valvetrain. The compression ratio was increased from 10.0:1 to 10.5:1 (except on the 3.5L EcoBoost HO for the Raptor, which remains at 10.0:1).
The camshaft VCT (phaser) design was also changed to improve reliability and reduce the development of a tapping noise over time.
Ford uses a single piston cooling jet per cylinder, but the oil volume was increased. The underside of the pistons were also redesigned to better transfer heat into the oil.
The engine also features auto start/stop, which decreases emissions during city driving by shutting the engine off in extended idling periods.
The engines are also 4 lb (1.8 kg) lighter than the previous 3.5L EcoBoost.
[89]