Overview
14" megaphone muffler
Show-polished finish
2.25" outlet permanent baffle
Great look and aggressive sound (optional noise reduction insert sold separately)
No modifications required
Aerospace quality, ultra lightweight stainless construction
Eliminates the OEM catalytic convertor
74% weight savings vs OEM muffler/catalytic converter
Two 12mm O2 bungs and one 18mm O2 bung pre-installed on collector (block-off plugs included
An easy and affordable way to customize your bike
Includes muffler, collector and necessary hardware
Includes PAIR block-off cap for decel-pop reduction
Designed to work with OEM front section only
Select from increased drivability/fuel mileage (pump gas) or race-proven (race fuel) track maps via our map support program at no additional charge
Click here to view logo plate color options
Click here to view exhaust installation instructions
Click here for PAIR block-off instructions
Brock’s Performance Slip-On Mufflers will transform any stock exhaust system into a great sounding, customized accessory. Slip-Ons are also very affordable, making them a very attractive option. Logo plates are available in several different colors to give your bike a custom look and lets not forget, at Brock's Performance, all pipes come free with industry-leading technical support.
Dyno Chart: Click image to enlarge
SAE Scale
Dyno Chart: Click image to enlarge
STD Scale
YZF-R1/M Exhaust System Decibel Levels
Testing procedure performed according to SAE J2825
Alien Head 2 Muffler (with Noise Reduction Plug):
Idle: 104dB / 5000 RPM: 110dB
Alien Head 2 Muffler:
Idle: 108dB / 5000 RPM: 113dB
YZF-R1/M Exhaust Weight Comparison
OEM Exhaust System:
Muffler: 3.0 lb.
Catalytic Converter: 13.25 lb.
Heat Shields: 0.80 lb.
Hardware: 1.15 lb.
Total = 18.20 lb.
Alien Head 2™ Slip-On Exhaust (3/4 System):
Muffler: 3.0 lb.
Collector: 1.70 lb.
Hardware: 0.10 lb.
Total = 4.80 lb.
Total Weight Savings = 13.40 lb. or 74% of OEM weight