Mitsubishi     COPYRIGHT © World Wide Enterprises
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
Eclipse SOHC N/A - N/A - - - - - - - - 240/125
52.1%
-
 - - -
Eclipse SOHC CNC M2 Race Systems N/A 35.25mm/ 25.7mm
3.575		 N/A - - - - - - - - 275/195
70.9%
90.9/121
269/359
.432/.42
 - - -
-
-
.281/.205
4G63 Gen I N/A 34mm/ 30.5mm N/A - - - 229/187
81.7%
81.4/82.6
241/245
.746/.679
 237/188
79.3%
84.2/83
249/246
.643/.569
 - - - - - - 233/188
80.5%
-
.271/.243
4G63 Gen I '89-94 CNC M2 Race Systems N/A 35mm/ 30.5mm
3.575		 N/A - - - - 251/202
80.5%
84.2/89.2
249/264
.662/.611
 - 283/240
84.8%
94.9/106
281/314
.56/.545
 284/249
87.7%
95.2/110
282/326
.499/.502
 - 286/260
90.9%
95.9/115
284/340
.411/.429
 - 276/238
86.1%
-
.279/.243
4G63 Alaniz Cyl Heads N/A 34mm/ 30.5mm N/A 77/75
97.4%		 117/117
100%		 154/151
98.1%
54.7/66.7
162/198
.627/.685
 187/174
93%
66.4/76.8
197/228
.609/.632
 206/189
91.7%
73.2/83.4
217/247
.559/.572
 216/197
91.2%
76.7/87
227/258
.503/.511
 220/199
90.5%
78.2/87.9
232/260
.448/.452
 221/200
90.5%
78.5/88.3
233/262
.40/.403
 223/202
90.6%
79.2/89.2
235/264
.363/.367
 - - 193/179
92.6%
-
.271/.243
4G63 Ported Level 4 Polk N/A 35mm/- N/A 106/- 161/- 188/-
63
187
.744
 241/-
80.8
239
.763
 270/-
90.5
268
.712
 298/-
99.9
296
.674
 309/-
104
307
.611
 320/-
107
318
.563
 334/-
112
332
.528
 346/-
116
344
.498
 357/-
120
355
.471
 282
-
-
.279
4G63 AMS SF600 N/A 34mm/ 30.5mm N/A 81/67
82.7%		 119/105
88.2%		 153/138
90.2%
54.4/60.9
161/181
.623/.626
 183/173
94.5%
65/76.4
193/226
.596/.628
 201/192
95.5%
71.4/84.8
212/251
.546/.581
 209/203
97.1%
74.3/89.6
220/266
.486/.527
 211/208
98.6%
75/91.8
222/272
.43/.472
 205/209
102%
72.8/92.3
216/273
.371/.422
 206/211
102%
73.2/93.2
217/276
.336/.383
 - - 186/180
96.8%
-
.271/.243
4G63 Ported AMS SF600 N/A 34mm/ 30.5mm N/A 107/88
82.2%		 151/134
88.7%		 189/193
102%
67.2/85.2
199/252
.77/.876
 222/229
103%
78.9/101
234/300
.723/.832
 244/245
100%
86.7/108
257/321
.662/.741
 258/249
96.5%
91.7/110
272/326
.60/.646
 269/255
94.8%
95.6/113
283/334
.548/.579
 274/261
95.3%
97.4/115
288/341
.496/.527
 277/265
95.7%
98.4/117
292/347
.451/.481
 - - 236/229
97.2%
-
.271/.243
4G63 1G Ported Fox Lake SF600 N/A - N/A - - - - - - 280/-
-
 289/-
-
 291/-
-
 - - 287
4G63 2G Ported Fox Lake SF600 N/A - N/A - - - - - - 272- 281/-
.050%
-

.050%
-
 287/-
-
 - - 235/.050
1G N/A 34mm/30.5mm N/A 78/84
107%		 - 150/170
113%
53.3/75.1
158/222
.611/.772
 - 204/205
100%
72.5/90.5
215/268
.554/.62
 218/206
94.5%
77.5/91
229/269
.507/.534
 225/-
79.9
237
.458
 - - - - 175/166
-
-
.271/.243
1G Mild Port N/A - N/A 83/- - 157/-
-
 - 222/-
-
 235/-
-
 244/-
-
 - - - - 188
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
1G Ported N/A - N/A - - - - - - 275/-
-
 - - - - -
1G Ported Mike +1mm valves N/A 35mm/31.5mm N/A 87/78
89.7%		 - 169/166
98.2%
56.7/68.7
168/204
.668/.73
 - 230/208
90.4%
77.1/86.1
228/255
.607/.609
 - 257/227
88.3%
86.2/94
255/278
.508/.499
 - 270/239
88.5%
90.5/98.9
268/293
.427/.42
 - - 203/184
90.6%
-
.279/.251
2G N/A 34mm/30.5mm
3.37
No Pipe		 N/A 80/73
91.3%		 - 155/146
94.2%
55.1/64.5
163/191
.631/.663
 - 211/181
85.8%
75/79.9
222/237
.573/.548
 - 227/183
80.6%
80.7/80.8
239/239
.462/.415
 229/183
79.9%
81.4/80.8
241/239
.414/.369
 - - - 180/153
84.9%
-
.271/.243
2G Ported N/A -
3.37
No Pipe		 N/A 91/73
80.2%		 - 173/147
85%
-
 - 226/210
92.9%
-
 - 254/234
92.1%
-
 269/240
89.2%
-
 - - - 203/181
89.2%
EVO 4G63 CHW Alum N/A 34mm/30.5mm
-
No Pipe		 43.3 74/75
101%		 - 147/142
96.6%
52.2/62.7
155/186
.599/.645
 - 195/176
90.3%
69.3/77.7
205/230
.529/.533
 - 200/179
89.5%
71.1/79
211/234
.407/.406
 - 196/182
92.9%
69.6/80.4
206/238
.319/.33
 - 198/181
91.4%
70.3/79.9
208/237
.269/.274
 168/156
92.6%
-
.271/.243
EVO 4G63 Ported CHW Alum N/A 35mm/31.5mm
-
No Pipe		 45 87/85
97.7%		 - 164/159
97%
55/65.8
163/195
.649/.699
 - 215/211
98.1%
72.1/87.3
214/259
.567/.618
 - 239/227
95%
80.1/94
237/278
.473/.499
 - 246/229
93.1%
82.5/94.8
244/281
.389/.403
 - 252/231
91.7%
84.5/95.6
250/283
.332/.338
 201/190
94.9%
-
.279/.251
EVO Ported Fox Lake SF600 N/A - N/A - - - - - - 265- 276/-
.050%
-

.050%
-
 280/-
-
 - - 230/.050
EVO 1 Sabre Heads JS N/A 34mm/30.5mm N/A 80/72
90%		 122/120
98.4%		 161/163
101%
57.2/72
169/213
.656/.74
 197/189
95.9%
70/83.4
207/247
.642/.686
 225/198
88%
79.9/87.4
237/259
.611/.599
 238/202
84.9%
84.6/89.2
251/264
.554/.524
 246/205
83.3%
87.4/90.5
259/268
.501/.465
 251/205
81.7%
89.2/90.5
264/268
.454/.414
 252/205
81.3%
89.5/90.5
265/268
.41/.372
 - - 212/186
87.9%
-
.271/.243
EVO 1 Ported Sabre Heads SF110 N/A 34mm/31.5mm N/A 78/79
101%		 118/132
111%		 159/172
108%
56.5/71.2
167/211
.647/.756
 197/194
98.5%
70/80.3
207/238
.642/.682
 225/207
92%
79.9/85.7
237/254
.611/.607
 240/219
91.3%
85.3/90.7
253/269
.558/.55
 251/224
89.2%
89.2/92.7
264/275
.511/.492
 257/227
88.3%
91.3/94
271/278
.465/.443
 261/231
88.5%
92.7/95.6
275/283
.425/.406
 - - 214/201
94%
-
.271/.251
EVO 4G63 Cosworth N/A 34mm/ 30.5mm N/A - - - - - - - - 282/257
91.1%
100/113
297/336
.459/.467
 - - -
-
-
.271/.243
EVO 4G63 Ported Cosworth N/A - N/A - - - - - - - - 335/282
84.2%
-
 - - -
EVO 8 4G63 David B N/A 34mm/30.5mm N/A - 177/135
76.3%		 - 221/197
89.1%
78.5/87
233/258
.72/.715
 - 224/218
97.3%
79.6/96.3
236/285
.521/.565
 - 228/218
95.6%
81/96.3
240/285
.413/.44
 - - - 213/192
90.4%
-
.271/.243
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
EVO 9 Kelford Cams N/A 34mm/ 30.5mm N/A 81/70
86.4%		 122/110
90.2%		 158/142
89.9%
56.1/62.7
166/186
.643/.645
 188/162
86.2%
66.8/71.5
198/212
.612/.588
 211/175
82.9%
75/77.3
222/229
.573/.53
 225/186
82.7%
79.9/82.1
237/243
.524/.482
 236/192
81.4%
83.8/84.8
248/251
.48/.436
 239/196
82%
84.9/86.5
252/256
.433/.395
 - - - 197/166
84.3%
-
.271/.243
EVO 9 Mild Port Kelford Cams +1mm valves N/A 35mm/ 31.5mm N/A 89/81
91%		 131/121
92.4%		 169/160
94.7%
56.7/66.2
168/196
.668/.703
 200/179
89.5%
67.1/74.1
199/220
.633/.629
 227/193
85%
76.1/79.9
226/237
.599/.565
 245/204
83.3%
82.1/84.4
243/250
.554/.512
 257/213
82.9%
86.2/88.2
255/261
.508/.468
 266/221
83.1%
89.2/91.5
264/271
.468/.432
 - - - 214/184
86.4%
-
.279/.251
EVO 9 CNC Heads UK N/A 1.377/1.24
100mm
Pipe		 N/A 77/72
93.5%		 115/- 154/161
104%
51.7/66.7
153/198
.61/.708
 188/-
63.1
187
.595
 211/202
95.7%
70.8/83.6
210/248
.557/.592
 219/-
73.5
218
.495
 222/219
98.6%
74.5/90.7
221/269
.439/.481
 226/-
75.9
225
.398
 227/226
99.6%
76.2/93.6
226/277
.359/.397
 - - 195/202
-
-
.279/.251
EVO 9 Ported CNC Heads UK N/A 1.377/1.24
100mm
Pipe		 N/A 89/85
95.5%		 133/- 177/186
105%
59.4/77
176/228
.701/.818
 213/-
71.5
212
.674
 240/239
99.6%
80.6/99
239/293
.633/.70
 263/-
88.3
262
.595
 278/271
97.5%
93.3/112
277/332
.55/.596
 286/-
96
285
.503
 291/294
101%
97.7/122
289/361
.461/.517
 - - 235/248
-
-
.279/.251
EVO IX Ported AMS +1mm valves SF600 N/A 35mm/ 31.5mm N/A 107/88
82.2%		 151/134
88.7%		 189/193
102%
63.4/79.9
188/237
.748/.848
 222/229
103%
74.4/94.8
221/281
.702/.805
 244/245
100%
81.8/101
242/300
.643/.718
 258/249
96.5%
86.5/103
256/305
.583/.625
 269/255
94.8%
90.2/106
267/313
.532/.56
 274/261
95.3%
91.9/108
272/320
.482/.51
 277/265
95.7%
92.9/110
275/325
.438/.466
 - - 236/229
97.2%
-
.279/.251
EVO X AMS SF600 N/A 34mm/ 30.5mm N/A 101/74
73.3%		 147/128
87.1%		 186/157
84.4%
66.1/69.3
196/205
.757/.713
 216/161
74.5%
76.7/71.1
227/211
.704/.585
 235/183
77.9%
83.5/80.8
247/239
.638/.554
 252/186
73.8%
89.5/82.1
265/243
.586/.482
 266/189
71.1%
94.5/83.4
280/247
.542/.429
 275/191
69.5%
97.7/84.3
290/250
.498/.385
 280/193
68.9%
99.5/85.2
295/252
.456/.35
 - - 232/174
74.7%
-
.271/.243
EVO X Ported AMS N/A - N/A 97/86
88.7%		 139/141
101%		 183/199
108%
-
 225/226
100%
-
 251/233
92.8%
-
 274/235
85.8%
-
 293/238
81.2%
-
 305/239
78.4%
-
 315/240
76.2%
-
 - - 248/219
88.2%
EVO X 4B11 David B N/A 34mm/ 30.5mm N/A - 141/142
100%		 - 202/197
97.5%
71.8/87
213/258
.658/.715
 - 242/212
87.6%
86/93.6
255/277
.563/.55
 - 256/219
85.5%
91/96.7
269/286
.463/.442
 - - - 210/193
91.6%
-
.271/.243
EVO X 4B11 N/A 34mm/ 30.5mm N/A 85/71
83.5%		 131/121
92.4%		 173/154
89%
61.5/68
182/201
.704/.699
 208/170
81.7%
73.9/75.1
219/222
.678/.617
 231/177
76.6%
82.1/78.1
243/232
.627/.536
 250/181
72.4%
88.8/79.9
263/237
.582/.469
 265/183
69.1%
94.2/80.8
279/239
.54/.415
 273/185
67.8%
97/81.7
287/242
.494/.373
 277/187
67.5%
98.4/82.6
292/245
.451/.34
 - - 226/170
75.1%
-
.271/.243
EVO X 4B11 Mild Ported Kelford Cams N/A 34mm/ 30.5mm N/A 86/80
93%		 131/127
96.9%		 173/157
90.8%
61.5/69.3
182/205
.704/.713
 209/178
85.2%
74.3/78.6
220/233
.681/.646
 235/189
80.4%
83.5/83.4
247/247
.638/.572
 256/194
75.8%
91/85.7
269/254
.596/.503
 272/197
72.4%
96.6/87
286/258
.554/.447
 283/198
70%
101/87.4
298/259
.512/.399
 292/200
68.5%
104/88.3
307/262
.476/.363
 - - 231/180
77.8%
-
.271/.243
G54B Ported Marnal N/A 1.80/1.50 N/A 58/51
87.9%		 - 114/91
79.8%
44.8/51.5
133/153
.69/.661
 - 170/118
69.4%
66.8/66.8
198/198
.686/.572
 - 211/141
66.8%
82.9/79.8
246/236
.639/.512
 - 223/155
69.5%
87.6/87.7
260/260
.54/.451
 - 229/160
69.9%
90/90.5
267/268
.462/.388
 168/119
71.2%
-
.365/.304
NT PPE LLC N/A - N/A 84/73
86.9%		 - 169/156
92.3%
-
 - 220/185
84.1%
-
 - 233/191
82%
-
 - - - - 177/151
85.7%
Manufacturer
Part Number		 Port/Vol
Int/Exh		 Valve Size Int/Exh Combust. Chamber Vol .100 .150 .200 .250 .300 .350 .400 .450 .500 .550 .600 Average
NT Port PPE LLC N/A - N/A 91/96
105%		 - 175/183
104%
-
 - 242/211
87.2%
-
 - 260/219
84.2%
-
 - - - - 192/177
92.3%
TT N/A - N/A 86-93/77-80
87.7%		 - 165-179/151-164
91.6%
-
 - 223-230/191-200
86.3%
-
 - 246-262/195-216
80.9%
-
 - 249-256/196-219
82.2%
-
 - - 199/169
84.9%
VR4 N/A - N/A 95/98
103%		 - 174/168
96.6%
-
 - 226/201
88.9%
-
 240/209
87.1%
-
 249/212
85.1%
-
 - - - - 197/178
90.2%