S-10 4.3L headers, Silverado and Sierra 5.0L 5.7L headers by Gibson. Gibson stainless steel headers provide sharper throttle response and horsepower and torque gains in the lower rpm ranges where you can use the power in everday use. Possible gas mileage gains as well! Gains of an average of 18-20 horsepower and 10-12 ftlbs of torque can be expected. Easy to install, the headers bolt up to the stock exhaust tubing. Made of 16 gauge stainless steel tubing with 3/8" thick flanges for durability. The Gibson stainless steel headers provide up to 35% more exhaust flow over the stock GM exhaust manifolds. The Gibson stainless steel headers are 50 state emissions legal and retains all emission devices. Gibson offers a lifetime limited warranty on their headers. The Gibson stainless steel headers do not effect the new vehicle warranty. Gaskets and hardware included. Gibson headers are made in the U.S.A. NOTE: The picture shows a chrome finish. This header does not have a chrome plated finish. It is an unpolished, natural stainless steel finish that can be painted. NOTE: 1988-1995 Silverado and Sierra headers will not fit vehicles with dual air fittings. Note: Silverado, Sierra applications fit 1500 model 2wd or 4wd. The picture shows the GP102S header. Chevrolet truck headers Gibson stainless headersAPPLICATIONS:: 1996-1999 Silverado, Sierra 5.0L no air injection-GP102S1996-1999 Silverado, Sierra 5.7L no air injection-GP102S1998-1999 Silverado, Sierra 5.0L air injection-GP114S1998-1999 Silverado, Sierra 5.7L air injection-GP114S1988-1995 Silverado, Sierra 5.0L no air injection-GP100S1988-1995 Silverado, Sierra 5.7L no air injetction-GP100S1996-1998 S-10 4.3L 2wd-GP117s Gibson stainless steel headers for Avalanche. Natural stainless steel finish. This header is not polished or chrome plated. Description is the same as above. Gibson GP129SAPPLICATIONS:: 2002-2007 AVALANCHE 1500 5.3L Order quickly and easily over the internet on our secure YAHOO! system 24 hours per day or talk to a real, live sales person at 419-331-2470 during our business hours. WE TAKE ORDERS to CANADA. For ordering information, click on "Orders to Canada" at the top left side of this page. LOW COST SHIPPING! Just $12.95 to ship your entire order by U.P.S. ground within the continental United States. Purchase any quantity of items and you pay just $12.95 to have it shipped! The more you order, the more you save! Orders to Hawaii, Puerto Rico, Virgin Islands, and some parts of Alaska will have shipping added due to having to be shipped by air freight. Customers from these states will be emailed the shipping costs for approval before we ship the order. We use Postal Priority for APO and FPO addresses only. Additional shipping charges may apply to APO or FPO addresses. Payment Methods: CREDIT cards or DEBIT cards VISA, MASTERCARD, DISCOVER, AMERICAN EXPRESS, MONEY ORDERS.