The BAER Trackers feature a 6061 T-6 fully machined sleeve that is anodized black, that is mated to a Teflon lined heim joint and machined pin which has correct taper so spindles are not required to be drilled/modified. These are vehicle specific pieces that help correct bumpsteer issues do to modified suspensions and/or poor OE design. Best of all these are made in the USA!
Details:

• Designed For 1971-1972 GM A-Body w/B-Body Spindles
• Also Fits: 1973-1977 A-Body, 1976-1981 Pontiac Firebird, and 1975 Firebird
• Direct Bolt-On Upgrade
• Fully Adjustable
• Simple Installation
• Tapered Pin For NO Spindle Modifications
• Vehicle Specific
• 6061 T6 Aluminum Sleeve
• Sleeve Length: 9.700 Inches
• Inner Sleeve Thread Size: 11/16 Inch x 18 LH Thread
• Outer Sleeve Thread Size: 5/8 Inch x 18 RH Thread
• Heim: 5/8 x 5/8 Inch Teflon Lined
• Sold As Pair

Note:

• There are 2 Factory Tire Rods on the 1975 Firebird. This is for the Factory outer end measuring 8.750 from center of the bowl to end of tie rod.