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(These fit the Regular/Super Cab) 1997/98 F-150 just make sure its for the newer body style, not the square style looking ford. 20yrs in the field, if you have any questions please ask. Here is the official fitment from ford :

2004	Ford	F-150	FX4, Lariat, STX, XL, XLT	4.6L V8 - Gas, 5.4L V8 - Gas
2004	Ford	F-150 Heritage	SVT Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
2003	Ford	F-150	Harley-Davidson Edition, King Ranch, Lariat, Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
2002	Ford	F-150	Harley-Davidson Edition, King Ranch, Lariat, Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
2001	Ford	F-150	Harley-Davidson Edition, King Ranch, Lariat, Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
2000	Ford	F-150	Base, Harley-Davidson Edition, Lariat, Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
1999	Ford	F-150	Base, Lariat, Lightning, XL, XLT	4.2L V6 - Gas, 4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - Gas
1999	Ford	F-250	Base, Lariat, XL, XLT	4.6L V8 - Gas, 5.4L V8 - Bi-Fuel, 5.4L V8 - CNG, 5.4L V8 - Gas
1999	Ford	F-250 Super Duty	Lariat, XL, XLT	5.4L V8 - Gas, 6.8L V10 - Gas, 7.3L V8 - Diesel