Rocky Mountain Suspension Products, blocks & u-bolts

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Superlift Blocks and U-Bolts

Superlift rear block kits contain a pair of cast iron blocks and 4 u-bolts with nuts and washers. These are the same blocks used with Superlift lift systems. They are made of cast iron, the material chosen by most OE vehicle manufacturers for their axle spacers. All sizes are tapered to address driveshaft angle, length and alignment, unless noted. U-bolts are manufactured from low allow, high strength steel. U-bolts up to 13" long have a typical yield strength of 90,000 PSI and a tensile strength of 120,000 PSI. The 14" and longer U-bolts typically have a 115,000 PSI yield and 133,000 PSI tensile strength. Thread type is National Fine Class 2A. Anti-corrosion finish is either zinc or E-coat.

Cast Iron Blocks Only

NOTE: BLOCKS ARE NOT TO BE USED ON THE FRONT OF ANY VEHICLE.

Chevy/GMC

Dodge

Ford

Jeep

Toyota

APPLICATION	YEAR	1-1/2"	2"	2-1/2"	3"	4"	5"
CHEVY / GMC -- Block kit with u-bolts. Click part number for pricing.
Blazer, Jimmy, Tahoe, Yukon	1969-72	3516	3527	3597	3538	3549	3559
	1973-91	3016	3027	3097	3038	3049	3059
	1992-99	3216	3225	3297	3238	3249	3259
Pickup 1/2 TON (88-98 3/4 TON 6-LUG)	1969-72	3516	3527	3597	3538	3549	3559
	1973-87	3016	3027	3097	3038	3049	3059
	1988-98	3216	3225	3297	3238	3249	3259
	1999-07	3816	3825	3897	3838	3849	3859
Pickup 3/4 TON (88-98 3/4 TON 8-LUG)	1969-72	3516	3527	3597	3538	3549	3559
	1973-87	3316	3327	3397	3338	3349	3359
	1988-98	3416	3425	3497	3438	3449	3459
	1999-07	3816	3825	3897	3838	3849	3859
Pickup 1 TON (Except Crew Cab and Dually)	1973-87	3716	3727	3797	3738	3749	3759
Pickup 1 TON (Except Crew Cab and Dually)	1988-98	3416	3425	3497	3438	3449	3459
Pickup 1 TON Crew Cab (Except Dually)	1973-91	3716	3727	3797	3738	3749	3759
Pickup 1 TON Crew Cab (Except Dually)	1992-98	3416	3425	3497	3438	3449	3459
Suburban 1/2 TON (92-99 3/4 TON 6-LUG)	1973-91	3016	3027	3097	3038	3049	3059
Suburban 1/2 TON (92-99 3/4 TON 6-LUG)	1992-99	3216	3225	3297	3238	3249	3259
Suburban 3/4 TON (92-99 3/4 TON 8-LUG)	1973-91	3316	3327	3397	3338	3349	3359
	1992-99	3416	3425	3497	3438	3449	3459
	2000-07	3816	3825	3897	3838	3849	3859
APPLICATION	YEAR	1-1/2"	2"	2-1/2"	3"	4"	5"
DODGE-- Block kit with u-bolts. Click part number for pricing.
Pickup 1/2 TON, Ramcharger, Trailduster	1969-01	4016	4027	4097	4038	4049	4059
Pickup 3/4 TON (Except Diesel)	1969-93	4016	4027	4097	4038	4049	4059
Pickup 3/4 TON with top mount overload	1994-02	-	-	4897	-	-	-
Pickup 3/4 TON without top mount overload	1994-02	-	-	4797	-	-	-
Pickup 3/4, 1 TON with 3-5/8" axle tube (flat block)	2003-07	-	4225	-	-	4249	-
Pickup 3/4, 1 TON with 4-1/8" axle tube (flat block)	2003-07	-	4925	-	-	4949	-
APPLICATION	YEAR	1-1/2"	2"	2-1/2"	3"	4"	5"
FORD-- Block kit with u-bolts. Click part number for pricing.
Bronco	1966-77	2416	2425	2497	2438	2448	2460
	1978-79	2016	2022	2097	2038	2048	2060
	1980-96	2116	2125	2197	2138	2148	2160
Bronco II	1984-90	2816	2825	2897	2838	2848	2860
F-100, F-150 2WD	1980-96	1616	1625	1697	1638	1649	1659
F-100, F-150 4WD	1966-79	1216	1225	1297	1238	1249	1259
	1980-96	1016	1025	1097	1038	1049	1059
	1997-03	1916	1925	1997	1938	1949	1959
F-250 2WD	1980-97	1816	1825	1897	1838	1849	1859
F-250 4WD	1966-77	1316	1325	1397	1338	1349	1359
F-250 4WD	1977.5-97	1416	1425	1497	1438	1449	1459
F-350 4WD (Except Dually)	1983-97	1516	1525	1597	1538	1549	1560
F-250, F-350 Super-Duty 4WD 3-5/8" Axle tube with top overload	1999-08	9116	9125	9197	9135	9149	9159
F-250, F-350 Super-Duty 4WD 3-5/8" Axle tube without top overload	1999-08	9016	9025	9097	9035	9049	9059
F-250, F-350 Super-Duty 4WD 3-7/8" Axle tube with top overload	1999-08	9316	9325	9397	9335	9349	9359
F-250, F-350 Super-Duty 4WD 3-7/8" Axle tube without top overload	1999-08	9216	9225	9297	9235	9249	9259
Ranger 2WD	1983-97	1716	1725	1797	1738	1749	1759
Ranger 4WD	1983-97	1116	1125	1197	1138	1149	1159
Ranger 4WD	1998-03	2316	2325	2397	2338	2349	-
APPLICATION	YEAR	1-1/2"	2"	2-1/2"	3"	4"	5"
JEEP-- Block kit with u-bolts. Click part number for pricing.
J10, J20 Pickup, Large Cherokee / Wagonneer	1974-90	5016	5027	5097	5038	5049	5059
TOYOTA-- Block kit with u-bolts. Click part number for pricing.
4-Runner 4WD	1979-86	7116	7127	7197	7138	7149	7159
Pickup 4WD (Except 89-96 short bed standard cab) 2-1/2" wide u-bolt	1979-96	7116	7127	7197	7138	7149	7159
Pickup 4WD short bed standard cab 3-15/16" wide u-bolt	1989-96	7216	7227	7297	7238	7249	7259

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CAST IRON BLOCKS ONLY - Sold in pairs. Click part number for pricing.
LIFT HEIGHT	1-1/2"	2"	2-1/2"	3"	4"	5"
9/16 HOLE / 9/16 PIN	015-2	020-2	025-2	035-2	045-2	055-2
9/16 HOLE / 9/16 PIN, FLAT BLOCK		023-2	—	038-2	048-2	058-2
9/16 HOLE / 19/32 PIN	014-2
11/16 HOLE / 5/8 PIN	016-2	021-2	026-2	036-2	046-2	056-2
15/16 HOLE / 15/16 PIN ADAPTOR	017-2	022-2	027-2			057-2

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For Orders or information, call 1-800-521-4908