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Mazda will sell a removable MX-5 Miata hardtop only to racers

Before the advent of the power-folding hardtop NC or the newer MX-5 RF targa, you could buy a fiberglass hardtop to plop on your soft-top Miata. Expensive when new and rather rare, they command top dollar now. And moreover, Spec Miata racers have always sought them for use in that series. Now, what's old is new again, sort of. Mazda Motorsports will sell a removable hardtop for $4,420, but there's a catch. You have to purchase a MX-5 Cup Global race car to order one. A Mazda spokesperson confirmed to Autoblog that non-Cup racers won't be able to purchase a new hardtop for their ND – and furthermore, since it's oddly shaped to clear the rollcage, they might not want to. Second-hand, who knows? Even though it's pricey, it'd offer a different experience than you get from the sexy RF. Related Video: Motorsports Mazda Convertible Racing Vehicles Performance mazda mx-5

Import pickup truck-killing Chicken Tax to be repealed?

After over 50 years, the so-called Chicken Tax may finally be going the way of the dodo. Two pending trade deals with countries in the Pacific Rim and Europe potentially could open the US auto market up to imported trucks, if the measures pass. Although, it still might be a while before you can own that Volkswagen Amarok or Toyota Hilux, if ever. The 25-percent import tariff that the Chicken Tax imposes on foreign trucks essentially makes the things all but impossible to sell one profitably in the US, which lends a distinct advantage to domestic pickups. Both the Trans-Pacific Partnership with 12 counties and Transatlantic Trade and Investment Partnership with the European Union would finally end the charge. According to Automotive News though, don't expect new pickups to flood the market, at least not immediately. These deals might roll back the tariff gradually over time, and in the case of Japan, it could be as long as 25 years before fully free trade. Furthermore, Thailand, a major truck builder in Asia, isn't currently part of the deal, and any new models here would still need to meet safety and emissions rules, as well. Automotive News gauged the very early intentions of several automakers with foreign-built trucks, and they weren't necessarily champing at the bit to start imports. Toyota thinks the Hilux sits between the Tundra and Tacoma, and Mazda doesn't think the BT-50 fits its image here. Also, VW doesn't necessarily want to bring the Amarok over from Hannover. There is previous precedent for companies at least considering bringing in pickup trucks after the Chicken Tax's demise, though. The Pacific free trade deal could be done as soon as this fall, while the EU one is likely further out, according to Automotive News. Given enough time, the more accessible ports could allow some new trucks to enter the market.

Tougher than steel: Wood pulp could make lighter auto parts

KYOTO, Japan — The global push among carmakers to make ever lighter vehicles is leading some auto suppliers in Japan to turn to what seems like an unlikely steel substitute — wood pulp. Japanese researchers and auto component makers say a material made from wood pulp weighs just one-fifth of steel and can be five times stronger. The material - cellulose nanofibers — could become a viable alternative to steel in the decades ahead, they say, although it faces competition from carbon-based materials, and remains a long way from being commercially viable.> Related: Jay Leno drives the Renew cannabis car — hemp you can't dent Reducing the weight of a vehicle will be critical as manufacturers move to bring electric cars into the mainstream. Batteries are an expensive but vital component, so a reduction in car weight will mean fewer batteries will be needed to power the vehicle, saving on costs. "Lightweighting is a constant issue for us," said Masanori Matsushiro, a project manager overseeing body design at Toyota. "But we also have to resolve the issue of high manufacturing costs before we see an increased use of new, lighter-weight materials in mass-volume cars."A NEW PROCESS Researchers at Kyoto University and major parts suppliers such as Denso Corp, Toyota's biggest supplier, and DaikyoNishikawa Corp, are working with plastics incorporated with cellulose nanofibers — made by breaking down wood pulp fibers into several hundredths of a micron (one thousandth of a millimeter). Cellulose nanofibers have been used in a variety of products ranging from ink to transparent displays, but their potential use in cars has been enabled by the "Kyoto Process," under which chemically treated wood fibers are kneaded into plastics while simultaneously being broken down into nanofibers, slashing the cost of production to roughly one-fifth that of other processes. "This is the lowest-cost, highest-performance application for cellulose nanofibers, and that's why we're focusing on its use in auto and aircraft parts," Kyoto University Professor Hiroaki Yano, who is leading the research, told Reuters in an interview. The university, along with auto parts suppliers, are currently developing a prototype car using cellulose nanofiber-based parts to be completed in 2020.