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Ships within 48 hours · Estimated delivery Sep 27 - Oct 2
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Description
Borla 400374 - XR-1 Multicore MufflerDesigned for rotary engine equipped vehicles, but can be used on other applications. Reversible design for installation flexibility. Patented Multicore design for maximum power. Recommend for high horsepower applications. T 304 Stainless steel will never rust. 100% welded construction for strength. High temperature T 304 stainless steel wool packing for sound control. There is no logo embossment on this part. Best of all, it's made in the USA. Just
Designed for rotary engine equipped vehicles, but can be used on other applications. Reversible design for installation flexibility. Patented Multicore design for maximum power. Recommend for high horsepower applications. T-304 Stainless steel will never rust. 100% welded construction for strength. High temperature T-304 stainless steel wool packing for sound control. There is no logo embossment on this part. Best of all, it's made in the USA. Just what you?d expect from the world?s most experienced (and most winning) exhaust brand.
Specifications:
| Description_ASM | XR-1? Multi-Core Racing Muffler For Rotary Engine Equipped Vehicles - 4" Center Inlet/ 4" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Universal Part. Reversible Design. |
| Description_DEF | Exhaust Muffler |
| Description_DES | XR-1 Multicore Muffler |
| Description_EXT | XR-1? Multi-Core Racing Muffler For Rotary Engine Equipped Vehicles - 4" Center Inlet/ 4" Center Outlet 6.25" Round x 16" Long Body 21" Overall Length. Universal Part. Reversible Design. |
| Description_INV | BorlaXR-1 Multi-Core Muffler |
| Description_MKT | Designed for rotary engine equipped vehicles, but can be used on other applications. Reversible design for installation flexibility. Patented Multicore design for maximum power. Recommend for high horsepower applications. T-304 Stainless steel will never rust. 100% welded construction for strength. High temperature T-304 stainless steel wool packing for sound control. There is no logo embossment on this part. Best of all, it's made in the USA. Just what you?d expect from the world?s most experienced (and most winning) exhaust brand. |
| Description_SHO | XR-1 Multi-Core |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
The dog toy set is cute, durable, and great value! Definitely get your fur babies these!
Style: Donkey, Elephant, Cattle, Monkey, Sloth, Style: Donkey, Elephant, Cattle, Monkey, Sloth
My dogs absolutely love these and the durability is great. The size and cost is really good. Definitely will purchase more in the future!
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Great, durable toy!
Style: Donkey&Sloth
My chihuahua tears the stuffing out of her toys, so I needed something different. This toy is perfect and the fact that there are two is even better. There is always one she can find. The size is just right for her to drag around, shake fiercely, and cuddle up to when she is done. She has had them for about three months and they are very durable. Other toys would have been torn up by now.
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Hana approved, gold star toy
Color: Original Pack, Color: Original Pack
This is, according to Amazon, our 11th set in 3 months. According to Hana, our shiba/chi mix, this toy is immaculate. Crunch score is a 10/10 and the squeak? Don't get her started. High pitched, easy to squeak and protected by just enough crunch and fabric that it actually lasts. In fact, she will tear the toy open before the squeaker gives up. This may seem like a small feat, however most toys last 12-30 minutes before the teefies take the squeaker out of commission. Lambchops last about 15 minutes before the squeaker gives in and fluff decorates the floor. The only reason we buy so many so often is because 1. The teefies do eventually puncture and the moment that happens she guts the poor Claw instantly. And 2. She has about 11 teefies, so the mouth gets kinda icky and due to the crunch, washing these kind of sucks- retains a lot of water and cant dry. So we replace them often even if she doesn't get to the gutting.
10/10. Its her favorite toy. And we've tested a lot of toys.
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Reviewed in the United States on May 17, 2026
★★★★★ 5
These are ADORABLE!
Color: Tropical Pack, Color: Tropical Pack
These are adorable! I got them as a gift for my in-laws pups and when I was taking pics of them my dog now wants them soooo I’m going to order more for her! They are so soft and the details are hilarious! Just be careful because the pawcohol content is pretty high so I’m sure your dog will be feeling it after just one! 🤣🤣🤣🤣🤣
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Reviewed in the United States on December 17, 2025
★★★★★ 5
Great quality
Color: Tropical Pack, Color: Tropical Pack
My dog went absolutely wild for these they crinkle but thy don’t squeak and I went wild for that! She is a stuffy destroyer and she’s had them for 20 minutes now and they are still intact great product I’ll definitely be ordering more toys from you guys
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Reviewed in the United States on December 25, 2025