Exhaust

Pro Circuit Ti-6 Muffler System (2025 KX250)

Kawasaki has an all new KX250 and Pro Circuit just recently came out with their latest Ti-6 version for the new green machine. With airbox changes to the 2025 version as well as a different cylinder head, this forced Pro Circuit to come up with a new headpipe and muffler. We have put time on…

ByKris KeeferDecember 16, 20240Comments

Bike Brands Exhaust Hard Parts Motocross

FMF 4.1 Ti Muffler System For Triumph TF250-X

The Triumph TF250-X is the newest 250 motocross machine so that means we haven’t had a lot of time with aftermarket mufflers yet until now. In stock form the TF250-X has a smooth low end power with a wide mid to top end but maybe lacks a little bit of excitement on low end (with…

ByKris KeeferDecember 9, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts KTM Performance

Why A KTM 250 SX-F FMF Megabomb Headpipe Is Better On A KTM 350 SX-F

I originally posted a photo of a KTM 250 SX-F FMF Megabomb headpipe mated to a KTM 350 SX-F 4.1 FMF muffler and my DM’s flooded with questions. Why does it do? Why stick the 250 headpipe on the 350? Normally when you purchase an aftermarket muffler system you usually get a smoother roll…

ByKris KeeferOctober 20, 20240Comments

Bolt-Ons Exhaust Hard Parts Kawasaki

Yoshimura RS-12 Stainless System (2024 KX450)

Written By: Eddie Laret/Kris Keefer We all know Kawasaki left a lot of room for improvement on the muffler side of things on the 2024 Kawasaki KX450. We have tried a number of mufflers to help increase the low end torque and have been happy with a couple. The latest muffler we tested was…

ByKris KeeferAugust 6, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance

Pro Circuit Vs. Akrapovic Muffler Shootout (2024 KX450)

ByKris KeeferJuly 5, 20240Comments

Bolt-Ons Exhaust Hard Parts Kawasaki

Akrapovic Evolution Muffler System (2024 Kawasaki KX450)

The Akrapovic Evolution muffler system is one of the most beautiful looking systems out there in the market today, is well built, and has quality welds all the way around it. The change of shape (from other aftermarket mufflers) in the Evolution muffler might take some getting used to but to me, it is one…

ByKris KeeferJune 30, 20240Comments

Exhaust Hard Parts KTM Performance

Yoshimura RS-12 Ti Full Muffler System Review (2024 KTM 350 SX-F)

Yoshimura’s goal was to add bottom end performance and over rev of the 23/24 KTM 350 SX-F engine character. On the dyno the new RS-12 TI system adds 2.7% max power and 2.6% max torque, but its not just about the numbers on the track is it? This new system is one of the few…

ByKris KeeferApril 9, 20240Comments

Exhaust Hard Parts Kawasaki Motocross

FMF 4.1 Slip On Muffler (2024 KX450)

We recently took delivery of FMF’s 4.1 slip on muffler design to put on our 2024 Kawasaki KX450. FMF is offering a full and a slip on design but for the time being let’s talk about the slip on version. FMF’s slip on version will shed almost 1.5 pounds off of the rear of the…

ByKris KeeferMarch 4, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Performance Yamaha

Pro Circuit Ti-6 Muffler System (2024 Yamaha YZ450F)

The Pro Circuit Ti-6 Titanium Exhaust System is constructed of titanium throughout the head pipe, mid pipe, and canister while the end-cap is carbon fiber. I wanted the Ti-6 system because I wanted to lose a little weight as the this version of the “6s” allows me to shed almost two pounds off of the…

ByKris KeeferJanuary 5, 20240Comments

Bike Brands Bolt-Ons Exhaust Hard Parts Kawasaki Performance

Pro Circuit Ti-6 Muffler System (2024 KX450)

Aftermarket muffler manufacturers rejoice! The 2024 Kawasaki KX450 has A LOT of room for improvement with its muffler system. The stock muffler is choked up and makes the KX450 feel somewhat lethargic for a 450. Yes, I know what you’re thinking.. “Kris, it’s a 450, how much power do we actually need”? You would be…

ByKris KeeferDecember 17, 20230Comments

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