Honda CRF45OR
Price: $799.95
Contact: 951/738-8050; www.procircuit.com
Material: Titanium
Style: Full three-piece system
Fit: The PC system uses springs to attach the midpipe to the canister and mounts easily in just minutes with the stock hardware.
Weight: 5.72 lb
Sound: 99.2 dB
On the track: Very smooth off the bottom, similar to the stock system. The midrange comes on strong, pulling hard into a very solid shot of top-end power. The top-end feels as if it pulls longer before hitting the rev-limiter, and the power doesn't fall on its face when the limiter kicks in as the PC system serves up a nice shot of usable overrev.
Overall score: 97.o
Pro circuit
Ti-4 gp
Suzuki RM-Z450
Price: $799.95
Contact: 951/738-8050; www.procircuit.com
Material: Titanium
Style: Full three-piece system
Fit: The PC system mounts up easily in minutes and uses springs to attach the midpipe to the canister.
Weight: 5.42 lb
Sound: 99.9 dB
On the track: Bottom-end power is strong and pulls hard into the midrange. Top-end power is much more usable than the stock pipe, as the PC revs out further with a lot of overrev. The PC system has usable power everywhere and can be lugged or revved to the moon. The delivery is also very smooth across the power curve.
Overall score: 98.o
Honda CRF45OR
Price: $699.98
Contact: 800/211-2767; www.twobros.com
Material: Polished titanium with a billet-aluminum end-cap
Style: Full three-piece system
Fit: We had no problems mounting this system; installation took only a few minutes. It features a very trick mounting system-the midpipe and the canister bolt together. The hardware is included and even comes with an Allen wrench.
Weight: 5.01 lb
Sound: 100.8 dB
On the track: The M7 has a strong, snappy bottom-end that pulls into a very hard-hitting midrange. Both the bottom and midrange are usable, and it is easy to wind up the revs in a hurry. Top-end power is strong but short, as this pipe makes the bike rev quickly. This system also has strong overrev. All of our test riders discovered more confidence accelerating out of tight corners.
Overall score: 97.5
Two Brothers Racing
m7
Suzuki RM-Z450
Price: $699.98
Contact: 800/211-2767; www.twobros.com
Material: Polished titanium with a billet-aluminum end-cap
Style: Full three-piece system
Fit: Bolted right on in minutes. It features a very trick mounting system. The midpipe bolts to the canister. All the hardware is included, as well as an Allen wrench.Weight: 5.00 lb
Sound: 100.5 dB
On the track: The M7 is super-snappy, offers tons of bottom-end that pulls hard and fast into the midrange. The power is instant with a stab at the clutch. The top-end spits out a quick surge of power before bumping the rev-limiter. This pipe is an extremely quick-revving, aggressive exhaust system; our pro and intermediate-level test riders loved it!
Overall score: 98.o
Honda CRF45OR
Price: $895.95
Contact: 714/692-3404; www.whitebrothers.com
Material: Titanium head and midpipe with a carbon-fiber canister
Style: Full two-piece system
Fit: The Carbon Pro bolts on in just minutes using the stock hardware.
Weight: 5.10 lb
Sound: 102.1 dB (FAILED)
On the track: Off the bottom, the White Brothers system hits hard-almost too hard. The power carries into a very strong midrange that allows you to get away with less shifting. Top-end power pulls strong and can be revved out much further than the stock system. Overall, it pulls much harder everywhere compared with stock.
Overall score: 98.5
White Brothers
Carbon pro
Suzuki RM-Z450
Price: $895.95
Contact: 714/692-3404; www.whitebrothers.com
Material: Titanium head and midpipe with a carbon-fiber canister
Style: Full two-piece system
Fit: Bolts on with ease in minutes using the stock hardware.Weight: 4.99 lb
Sound: 102.1 dB (FAILED)
On the track: This system has it all, including strong power from the bottom that pulls hard all the way through the top-end. Similar to the Two Brothers unit, this one is super-aggressive as the power comes on instantly. It worked the best in high-speed sections as the power pulls and never really signs off. This setup really opened up third and fourth gears with as much roll-on power as could be lugged or revved; great power characteristics for all levels of riding.
Overall score: 99.o
Honda CRF45OR
Price: $795.95
Contact: 909/628-4722; www.yoshimura-rd.com
Material: Full titanium
Style: Full two-piece system
Fit: The Yosh system bolts on in just minutes using the stock hardware.
Weight: 6.30 lb
Sound: 101.1 Db
On the track: Off idle, the power is more usable and carries over to a very mellow-but consistent-midrange. The top-end pulls longer and stronger than the stock system. The Yosh system has a linear feel, requiring a bit of clutch to keep the revs up. Riders who like to rev their bike to the moon will love this system, as it seems to rev out super far.
Overall score: 94.O
Yoshimura
Trc pro-series
Suzuki RM-Z450
Price: $795.95
Contact: 909/628-4722; www.yoshimura-rd.com
Material: Full titanium
Style: Full two-piece system
Fit: Bolts on with ease in minutes using the stock hardware.
Weight: 6.20 lb
Sound: 100.2 dB
On the track: The Yosh setup offered more bottom and midrange with much more-usable roll-on power. We were able to wring out second gear much longer, most noticeably when accelerating out of tight corners. Top-end also has good, solid, usable power that pulls much longer than the stock system.
Overall score: 98.O