Please tap Read More for more details of the product. Fit 88-99 Chevy/GMC trucks and SUVs (2WD & 4WD) 5.0L/5.7L305/350 cu. Full length design for power gain from mid to high RPM range. Long transition collector for decreased back pressure. Fully mandrel bent tubes made of 16-gauge mild steel. Head flanges laser-cut from 5/16-inch thick steel plates. Flanges flattened by hydraulic press for precise and leak-free seal. All joints TIG welded for resistance against cracking and wearing. Black paint coating that withstands up to 500 degrees Celsius. Long Tube / Full Length. 16 gauge (1.5mm). For track/off-road use only. No instructions provided; professional install recommended. Unless otherwise stated, all of our products are. For racing and track/off-road use. No emission compliance is provided. All of our products shall be used in accordance with any applicable local regulations and restrictions on road safety and exhaust emission. No install instructions are provided. Professional install is highly recommended. We shall not be liable for any consequences due to improper use of our products.