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The $45,000 Exhaust Pipe Test - Individual Rider Ratings of The Dirt Bike Pipes

2006 Kawasaki KX450F and Honda CRF250R Exhaust Pipe Comparison
Photography by Karel Kramer

KX450F

Keefer

 

Lewis

 

 

Pipe

Perris

Glen Helen

Perris

Glen Helen

 

Akrapovic Evolution System

89

84

77

78

 

Bug Gun EvoR with Vortex

82

81

86

93

 

DEP System

FAIL

 

 

 

 

DMC Afterburner ProQuiet System

84

85

88

88

 

Dr. D Carbon Race System

89

88

88

85

 

Dr. D Stainless SA System

89

89

90

92

 

FMF Factory 4.1- Megabomb Header

88

89

92

88

 

FMF Slip On

90

85

88

83

 

Hindle Slip On

78

78

78

75

 

Hindle System

81

76

85

82

 

Jardine

FAIL

 

 

 

 

PC 496 Slip On

78

82

88

89

 

PC Ti4 System

85

85

75

84

 

Stock

86

86

86

86

 

Two Brothers M-7

89

87

89

86

 

 

 

 

 

 

 

 

 

 

 

 

 

CRF250R

Armstrong

Orr

 

Denison**

 

Perris

Glen Helen

Perris

Glen Helen

Perris

Akro Dual

88

85

94.5

93.5

86

Akro Single

89

90

83

94.5

83.5

Big Gun EvoR with Vortex

89

78

78

78

85

DEP Twin

98

97

96

95.9

89

DMC Single System

89

81

95

89

88

Dr. D system with long core

93

89

95

94.5

84.5

Dr. D system with short core

93

93

94.5

94

85.5

FMF Factory 4.1 -megabomb

91

89

93

94

87

Leo Vince Twin System

85

92

90

95

80.5

Pc Ti4 Single system

FAIL

 

 

 

 

PC Twin Ti4 system

FAIL

 

 

 

 

Rocket

89

84

90

95

82.5

Stock

88

88

88

88

88

Two Brothers M-7 System larger insert

96

92

93

94

85

Two Brothers M-7 System Small insert

92

85

82

84

82

 

 

 

 

 

 

 

 

 

 

 

 

** Denison's ratings were not averaged into the test

 

 

 

 Kx450f Crf250r Pipe Test Rider Ratings Honda
Burning laps on the Honda... 
   
  read full caption
 Kx450f Crf250r Pipe Test Rider Ratings Honda
Burning laps on the Honda.
 Kx450f Crf250r Pipe Test Rider Ratings Kawasaki
And the Kawasaki.
 Kx450f Crf250r Pipe Test Rider Ratings Passing
The rider in front read the... 
   
  read full caption
 Kx450f Crf250r Pipe Test Rider Ratings Passing
The rider in front read the Dirt Rider pipe shootout. The rider in back read one of the 'other guys' pipe shootouts.

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