GSTP Auto Parts: fuel system kits, headers and fix-it parts for DIY mechanics

Shopping at GSTP Auto Parts? See all current GSTP Auto Parts promo codes and deals, checked regularly.

GSTP Auto Parts is an online shop for aftermarket car and truck parts, aimed squarely at people who do their own work. The range leans towards performance and fuel system builds (braided fuel hose, PTFE fittings, fuel cells, regulators and intake manifolds for LS engine swaps), but there's plenty for everyday repairs too, from door latch cable kits to crankcase ventilation filters for diesel pickups. You can browse by make (Audi, BMW, Honda, Jeep, Tesla and Volvo are among the trending ones) or by area of the vehicle: air and fuel delivery, performance, suspension, engines, interior, exterior, tools and motorcycle parts.

It suits home mechanics, hot rod and drift builders, and anyone keeping an older truck on the road. Most listings spell out fitment in the title, so check the years, engine and model carefully before you order. The shop also runs a how-to blog covering jobs like hub bearings, fuel injectors and cooling systems, which is handy if you're tackling a repair for the first time.

What's worth a look

Here are six picks from the GSTP homepage when we checked, from small fix-it kits to bigger build parts:

The cheapest fixes are often the most useful. The 8 Rear Door Latch Cable Repair Kit for Ford F150 and F250 extended cabs was $15.99, as was a transfer case shifter linkage with grommet bushings for 2002 to 2005 Dodge Ram 4x4s. If you're plumbing a fuel system, the PTFE hose end fittings start at $10.99 for a pair (AN4 to AN12, in black or red), and 10AN braided CPE fuel hose starts at $59.99 in 10, 16 and 20ft lengths.

For bigger projects, truck headers for 1960 to 1986 C-10 LS conversion swaps were $219.99, down from $239.00, and a 10 gallon aluminum fuel cell with level sender started at $169.99 against a regular $189.00. GSTP also sells its own fuel line fittings installation tool for PTFE and CPE hose, from $159.99.

Current offers

When we checked, GSTP was offering 5% off a first purchase with the code GSTP, and free shipping on all orders. A lot of product cards also show a crossed-out regular price next to a lower sale price, and there was an off-season sale on its lawn mower blade sharpener.

How to save more

• Use the GSTP code on your first order, and put everything for one job in that basket, since the discount only applies once.
• Check the variant before adding to cart. Fittings, hose and fuel cells come in several sizes and kits, and the price shown on the card is the starting price.
• Compare the sale price with the regular price on the card. Some markdowns are small, so it's worth weighing up whether a part needs buying now.

Products, prices and offers checked on the store's own website on 6 Nov 2026. Prices and stock can change.

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