Apollo Optics is proud to Introduce SPD’s Helmholtz Resonated HX Series muffler upgrade for your 2017-2020 Gen2 Raptor. The Helmholtz Resonator targets and neutralizes specific drone frequencies without making the exhaust too quiet.
SPD has again allowed me to test this new setup on my truck.
I have been doing some comparisons between the resonated HX and non Resonated.
Cold start is quite a bit quieter. Partial throttle (normal driving) is quieter as well. The exhaust interior note from 1500-3000 rpm is much quieter than before. Wide open throttle is about the same for both.
My son and I took comparison videos of before (HX)and after(Res HX)
We used the NIOSH Sound Level Meter to compare decibel readings.
One thing to remember is my setup is going to be just about as loud as you can get. I am currently running SPD’s Stainless Downpipes and SPD’s Trombone.
One of the video’s below you can hear the A/C on high (68 DB) and the truck at normal speeds is quieter.
HX Muffler Res HX Muffler
55 mph- 66.1 DB
60 mph - 67.4 DB 60 mph -
65 mph - 68.2DB 65 mph - 74 DB
70 mph - 71.2 DB 70 mph - 74.4 DB
75 mph - 74.7 DB 75 mph - 76.4 DB
80 mph - 75.2 DB 80 mph - 77.8 DB
85 mph - 85 mph - 80.8
Full throttle- 89 DB Full throttle 89 DB
Current lead time will be 1-2 weeks for the new HX muffler. The MSRP on the Helmholtz muffler is $1199.
We carry everything from SPD here at Apollo Optics and I would be more than happy to put a bundle together for you with this new Resonated HX muffler and a Trombone or the resinated HX by itself.
Happy to help.
If you have any questions please don’t hesitate to ask.
Kyle
*For those wanting to add the Helmholtz resenator to an HX muffler you already own, SPD will have an exchange program. It will be $350. You will purchase the Helmholtz upgrade and SPD will send you a new Res HX muffler and then you will return the HX muffler your currently have. This is so you have no down time if this is your daily driver. *
Videos
SPD HX Muffler
"
SPD Helmholtz HX DB levels
"
Helmholtz HX wide open throttle
Helmholtz HX muffler interior wide open throttle
Helmholtz manually down shifting
SPD has again allowed me to test this new setup on my truck.
I have been doing some comparisons between the resonated HX and non Resonated.
Cold start is quite a bit quieter. Partial throttle (normal driving) is quieter as well. The exhaust interior note from 1500-3000 rpm is much quieter than before. Wide open throttle is about the same for both.
My son and I took comparison videos of before (HX)and after(Res HX)
We used the NIOSH Sound Level Meter to compare decibel readings.
One thing to remember is my setup is going to be just about as loud as you can get. I am currently running SPD’s Stainless Downpipes and SPD’s Trombone.
One of the video’s below you can hear the A/C on high (68 DB) and the truck at normal speeds is quieter.
HX Muffler Res HX Muffler
55 mph- 66.1 DB
60 mph - 67.4 DB 60 mph -
65 mph - 68.2DB 65 mph - 74 DB
70 mph - 71.2 DB 70 mph - 74.4 DB
75 mph - 74.7 DB 75 mph - 76.4 DB
80 mph - 75.2 DB 80 mph - 77.8 DB
85 mph - 85 mph - 80.8
Full throttle- 89 DB Full throttle 89 DB
Current lead time will be 1-2 weeks for the new HX muffler. The MSRP on the Helmholtz muffler is $1199.
We carry everything from SPD here at Apollo Optics and I would be more than happy to put a bundle together for you with this new Resonated HX muffler and a Trombone or the resinated HX by itself.
Happy to help.
If you have any questions please don’t hesitate to ask.
Kyle
*For those wanting to add the Helmholtz resenator to an HX muffler you already own, SPD will have an exchange program. It will be $350. You will purchase the Helmholtz upgrade and SPD will send you a new Res HX muffler and then you will return the HX muffler your currently have. This is so you have no down time if this is your daily driver. *
Videos
SPD HX Muffler
SPD Helmholtz HX DB levels
Helmholtz HX wide open throttle
Helmholtz HX muffler interior wide open throttle
Helmholtz manually down shifting
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