VALVES
STAINLESS VALVES Small Block Chevrolet Severe Duty® Exhaust Valves XH-428 Stainless Material Chrome Stems Hard Tips Swirl Polished Fully Machined Head Stem Part No. Type Diameter Diameter
Installed Height
O / A Length
Tip Underhead Length Angle / Radius Margin
Seat Width
Top of Head
Wgt / Grams
11567-8 11887-8 11747-8
Exh. Exh. Exh.
1.500 1.500 1.500
.3415 .3415 .3415
Stock .100 Longer .200 Longer
4.911 5.036 5.140
.250 .250 .290
10° x 3/8” 15° x 1/2” 15° x 1/2”
.060 .085 .085
.100 .085 .100
7° Dish 10° Dish 9° Dish
92 94 101
11543-8 11595-8 11539-8 11865-8
Exh. Exh. Exh. Exh.
1.600 1.600 1.600 1.600
.3415 .3415 .3415 .3415
Stock Stock .100 Longer .200 Longer
4.911 4.936 5.036 5.121
.250 .250 .250 .250
10° x 3/8” 10° x 3/8” 10° x 3/8” 15° x 1/2”
.060 .085 .085 .070
.100 .085 .085 .100
7° Dish Flat Face 7° Dish 9° Dish
95 100 102 105
11551-8 11869-8 11771-8 11785-8
Exh. Exh. Exh. Exh.
1.600 1.600 1.600 1.600
.3415 .3415 .3415 .3415
Stock .100 Longer .200 Longer .300 Longer
4.921 5.021 5.121 5.221
.250 .250 .250 .250
30° x 1/2” 30° x 1/2” 30° x 1/2” 30° x 1/2”
.070 .070 .070 .070
.100 .100 .100 .100
25° Dish 25° Dish 25° Dish 25° Dish
106 109 111 113
11573-8 11749-8 11751-8 11753-8 11755-8 11513-8 11767-8
Exh. Exh. Exh. Exh. Exh. Exh. Exh.
1.600 1.600 1.600 1.600 1.600 1.600 1.600
.3415 .3415 .3415 .3415 .3415 .3415 .3415
Stock .100 Longer .200 Longer .300 Longer .400 Longer .500 Longer .600 Longer
4.965 5.065 5.165 5.265 5.365 5.465 5.565
.290 .290 .290 .290 .290 .290 .290
15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2”
.090 .090 .090 .090 .090 .090 .090
.100 .100 .100 .100 .100 .100 .100
9° Dish 9° Dish 9° Dish 9° Dish 9° Dish 9° Dish 9° Dish
107 108 110 111 112 113 114
11541-8 11585-8 11537-8 11871-8
Exh. Exh. Exh. Exh.
1.625 1.625 1.625 1.625
.3415 .3415 .3415 .3415
Stock Stock .100 Longer .200 Longer
4.911 4.936 5.036 5.121
.250 .250 .250 .250
15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2”
.060 .085 .085 .070
.100 .100 .100 .100
9° Dish 9° Dish 9° Dish 9° Dish
95 106 102 105
11557-8 11569-8 11571-8 11579-8
Exh. Exh. Exh. Exh.
1.625 1.625 1.625 1.625
.3415 .3415 .3415 .3415
Stock .100 Longer .200 Longer .300 Longer
4.921 5.021 5.121 5.221
.250 .250 .250 .250
30° x 1/2” 30° x 1/2” 30° x 1/2” 30° x 1/2”
.070 .070 .070 .070
.100 .100 .100 .100
25° Dish 25° Dish 25° Dish 25° Dish
109 111 113 115
11851-8 11577-8 11757-8 11759-8 11511-8 11763-8
Exh. Exh. Exh. Exh. Exh. Exh.
1.625 1.625 1.625 1.625 1.625 1.625
.3415 .3415 .3415 .3415 .3415 .3415
.100 Longer .200 Longer .300 Longer .400 Longer .500 Longer .600 Longer
5.065 5.165 5.265 5.365 5.465 5.565
.290 .290 .290 .290 .290 .290
15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2” 15° x 1/2”
.090 .090 .090 .090 .090 .090
.100 .100 .100 .100 .100 .100
9° Dish 9° Dish 9° Dish 9° Dish 9° Dish 9° Dish
109 115 116 117 118 122
Need a different length? Head diameter not listed? Prefer a BeadLoc® groove? See pages 42 & 43 for Gen II blanks to construct a valve to your exact specifications.
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