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\ 6G 110a. Notice gray plastic bearing cap.         The small frame version measures 4 3/4″ from bolt to bolt White/ Blue voltage regulator is PCM controled              Most pulleys are 2 1/4″ OD $105.00              $50.00 core

6g 110 amp. White/Blue voltage regulator at 7 o’clock.   Most pulleys 2 1/4″ OD $99.00              $50.00  A=163r,194n, 127g, 151g  Z=153r, 213n, 119g, 166g  O=na (4-15)

6G 135 amp LARGE frame. White/blue voltage regulator at 2 o’clock.   Most pulleys are 2 1/2″ OD. $109.00                     $50.00 core

6G. 110 amp. 3 bolt side mount. Gray voltage regulator at 2 o’clock Most pulleys are 2 1/4 ” OD. 8 groove. $109.00                  $50.00 core

6g. 135amp. Large frame, V shape on bottom.  Gray voltage regulator at 10 o’clock. Most pulleys are 2 1/4″ OD $109.00                $50.00 core

3G. 95 amp. Straddle mount.                                                  Top ear is a HOLE Note groups of 4 holes  inside webs indicates 95 a version.  Most pulleys are 2 1/4″ OD. $79.00      

3G very popular on 4.6L and 5.4L trucks. Notice 2 holes inside of webs indicates 130 amp version. Usually 8 groove pulley. $99.00                $30.00 core A=114,174n,88g,135g  Z=114, 191n,89g, 148g  O=114r, 174n, 88g, 135g (4-15)

4G. 130 amp. Notice black metal shield on back. Gray voltage regulator. Most pulleys 2 1/2 OD $99.00            $40.00 core  A=144r, 112g  Z=129r, 180n, 100g, 140g  O=129r, 174n, 100g, 135g  (4-15),  Z=89 weez 9/18

4G. 130 amp. Note the black metal cover on back.           Gray Voltage regulator Most pulleys 2 1/2″ OD. $99.00        $50.00 core

4G. 130 amp. Notice black metal cover on back.  Black voltage regulator.  Most pulleys 2 1/2″ OD $99.00                     $45.00 core