Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 14 - Jul 19
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Description
Aftermarket Assassins 2022-Up RZR Pro R 4 Cylinder Header Pipe **5-10 Day Lead Time**Looking for a header to complete the look and performance of your AA slip on exhaust? Then you need the AA stainless steel Pro R header! The OEM header is an odd 2 into 2 into 1 design and has many areas to improve upon. We set out to make a functional header that looks great. Nearly 6RWHP peak and over 4 RWHP max gain over the stock header when used with AA ECU flash and AA slip on exhaust. This is nearly 8 9 crank horsepower gains at 60mph and does
- Looking for a header to complete the look and performance of your AA slip-on exhaust? Then you need the AA stainless steel Pro R header! The OEM header is an odd 2 into 2 into 1 design and has many areas to improve upon. We set out to make a functional header that looks great.
- Nearly 6RWHP peak and over 4 RWHP max gain over the stock header when used with AA ECU flash and AA slip-on exhaust. This is nearly 8-9 crank horsepower gains at 60mph and does not lose any bottom end power.
- Excellent low end to top end performance
- Works great with our level 2 tune, clutch kit & other performance products
- Baseline(OEM header) was tested, then we quickly swapped our final header design in place to show the most consistent/real gains in the same hour of each other.
- Engineered to have equal length runners into the collector
- Matches our slip-on exhaust perfectly
- Stainless steel stepped header design for improved flow and longevity
- Hydroblasted finish with rust inhibitor looks great and turns bronze with heat
- Does not use factory heat shielding and should only be used with a slip-on exhaust with no catalytic converter
- Made in-house at our facility in the USA
- Extremely easy installation, bolts in like factory using OEM gaskets/mounting
Free Shipping to the Lower 48
- Header includes a new gasket where it meets the cylinder head
- Why the AA header over others? We design, build, and ship everything in house. Our header design has straight runners and goes around the frame rail like OEM which simply makes power. Other headers may look great and run inside the rail, but they will not perform well because of the sharp bends off the head.
jds 1/27/23
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 1238 reviews
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Product Reviews
★★★★★ 5
Perfect applicators tool
Tool worked great. Bonds sound proofing to metal perfectly.
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Must have
These things a freaking AWESOME!
If you're doing a big sound deadner job, you need thees! The 3 different sizes are perfect for the different shapes in the floor pans. Well built, good quality and they have a nice weight to them. Just buy them and thank me later. For $15.00 you can't go wrong.
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Reviewed in the United States on March 12, 2026
★★★★★ 5
Great sound mat for the price!
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
This is a good product. Many people go with KILMAT because of the value to price point. I did as well. When you clean the surface (in my case it was all painted metal) this stuff sticks very well. I do recommend you use a seam roller of some type, I used Lumiteco 3 piece roller set. This will help with adhesion and mostly flatten the overlapped edges. It also helps you see where you have rolled as it leaves little grooves. The difference when we had no sound mats and after was very impressive. We haven't finished our install yet and it is quieter than when we had an interior in the van. There are thicker mats available in other brands, but this will work great for our van build, but this helps keep the weight down. It is quality material, just be careful when you are removing the backing, the edge of the foil face can cut you. I suggest you layout where you are installing the mat and cut to fit. From what I have read, you don't need to cover every inch in the vehicle, just spot install for a big difference. I chose to cover most surfaces to help keep sound out when we are sleeping in the van. We haven't finished putting the van yet, but we have driven it around and been very satisfied with this product.
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Reviewed in the United States on December 3, 2025
★★★★★ 5
Excellent sound deadening mats
Style: 80 mil 36 sqft, Style: 80 mil 36 sqft
Purchased these for a 2020 Lexus RX350 due to the hollow sound of the car doors when shutting. They sounded cheap. The mats are super sticky and I applied them when the doors were hot from sitting in the sun. They alubutyl sticks like crazy and the end result was perfect. Now I have solid sounding doors. Good quality product.
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Awesome product 👌
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
I love this stuff. I use it alot.
Sticks great
Easy to use
Molds super easy
Really helps with sound. Great product.
I wish I could get sponsored for this product on my projects..
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Reviewed in the United States on April 30, 2026