Four Rings Auto Engine and Transmission Skid Plates - Audi / B8 / B8.5 / A4 / A5 / S4 / S5 | FRA006

Quality of the plates themselves is superb. I had to upsize the holes and slots a little bit to get the best fit across so many fastener locations. I would also recommend replacing more of the 1/4 turns with m8 riv nuts and bolts. Not only is it more secure, but the thickness of the plate makes the 1/4 turns impossbile to use in some locations. The same style hex drive pan head that comes in the kit can be sourced on amazon. They also make m8 speed nuts to be used on the lower radiator and wheel well liner. I went with M8 hardware across both plates so everything is the same. Highly recommend an actual riv nut puller instead of the screw tool. The former will work, but is slow and time consuming. On the driver's side, one of the x-brace M8 bolts is too tall and will hit the steering column. You will need to use a shorter one. You may also have to trim off the L-bracket over the subframe. My triple square bolts were seized to their riv nut and impossible to remove. That said, make sure you use anti-seize on these bolts every time you take them out. Having to remove and replace one would be a pain. Bolt should be M8x25. You can get this stuff on mcmaster too, but the shipping will bite you. You will get more spares though through mcmaster. Also, packaging was decent but NO INSTRUCTIONS. Refer to ECS's set. It will call out the torque spec on the x-brace bolts. Measure riv nut diamter and match to appropriate drill bit for upsizing. Bolts: https://www.amazon.com/dp/B08BJZ9LLR?psc=1&ref=ppx_yo2ov_dt_b_product_details Speed Nuts: https://www.amazon.com/dp/B0B1WSSTB4?psc=1&ref=ppx_yo2ov_dt_b_product_details Riv Nuts: https://www.amazon.com/Keadic-Stainless-Threaded-Nutsert-Assortment/dp/B07HK648VK/ref=sr_1_10?crid=19RB6HXMPR13U&dib=eyJ2IjoiMSJ9.421Z7N1xwRv6ROTXJB9tPKh8D_ofiVmUFJIx7l23i83Kg1EZdT0-hGAsYg_k4K_gFCEwRy_UoEjduByOhopcD1HFUKJkfUVjTgnJZf66f1QxkmD_XFLSUOmAm2TgjBsSiK9ahwjSPhBk-LEhWbXfrYYZh2KoOn4BgSZKFDtuRuQQnEzmf5wcvbLsS_agldE0F6JevXum5t0XREb31EHFTYGY9NYJwoUF8nWJ5pfVRPE.b2Braz9IRS4OWvEdFc-hl0WJzo0TbWD_nRfZyLgOHYg&dib_tag=se&keywords=m8%2Briv%2Bnut&qid=1705632993&sprefix=m8%2Briv%2Bnut%2Caps%2C143&sr=8-10&th=1