{"product_id":"prl-motorsports®-16-21-honda-civic-si-1-5l-big-bore-cobra-cold-air-intake-system","title":"PRL Motorsports® (16-21) Honda Civic Si 1.5L Big Bore Cobra Cold Air Intake System","description":"\u003ch1\u003eCOMPATIBLE: (1.5L)\u003c\/h1\u003e\n\u003ch1\u003e2016 - 2021 HONDA CIVIC Si \u003c\/h1\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2\u003eINSTALLATION:\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0568\/5703\/4945\/files\/PRL_Civic-2016-NA_HVI-InstallGuide_8.5x5.5_CARB.pdf?v=1680632850\" title=\"PDF - 2022+ Honda Civic 2.0L Stage 1 Intake System Install Instructions\"\u003e\u003c\/a\u003e\u003ca title=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0568\/5703\/4945\/files\/cobra_si_street_install.pdf?v=1679588042\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0568\/5703\/4945\/files\/PRL_Civic-2016-NA_HVI-InstallGuide_8.5x5.5_CARB.pdf?v=1680632850\"\u003e\u003cspan\u003e\u003cstrong\u003ePDF - 2016-2021 Honda Civic 1.5T Cobra Cold Air Intake System Install Instructions (Big Bore)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\u003cspan\u003e\u003cstrong\u003e\u003cimg src=\"https:\/\/cdn8.bigcommerce.com\/s-8fmm9av\/product_images\/uploaded_images\/pdf_icon_50.png\" alt=\"PDF Document Icon\"\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch2\u003eImportant Notes:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003eBIG BORE MAF-SPECIFIC CALIBRATION IS REQUIRED FOR BIG BORE MAF HOUSING\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eBIG BORE MAF BASEMAP CALIBRATIONS AVAILABLE IN BOTH HONDATA \u0026amp; KTUNER\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eTWO STEP PERFORMANCE \"TSP\" \u0026amp; PHEARABLE CALIBRATIONS COMPATIBLE BY SELECTING \"RACE MAF\" OPTION\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eNOT COMPATIBLE WITH FACTORY CVT COOLER (SPAIN, TURKEY, ETC)\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003eTechnical Notes:\u003c\/h2\u003e\n\u003ch2\u003eThere’s a reason our Cobra Cold Air Intake Systems is a constant topic of discussion and so highly regarded. Our CNC machined billet aluminum MAF Housing was designed to provide *factory-spec fuel trims (-4% of factory STFT \u0026amp; LTFT) for optimal drivability and performance. The Cobra CAI utilizes a 4\" volume from the air filter into the MAF Housing and is available with two different MAF housing choices; a Standard Bore housing and a Big Bore housing. Both housings utilizes the factory MAF sensor, but feature two different diameters and profiles. As mentioned above, the Standard Bore housing is designed to provide factory-spec fuel trims WITHOUT any tuning whatsoever. The Big Bore housing allows a 50% larger volume of air in comparison to the Standard Bore housing, which is why a tune IS required. This larger volume of airflow reduces pumping loss and creates an unrestricted air path to feed the MAF housing with ambient temperature air.\u003c\/h2\u003e\n\u003ch2\u003eCustomers can switch between MAF housings without having to buy another intake system by purchasing our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/prlmotorsports.myshopify.com\/collections\/intake\/products\/2016-honda-civic-1-5t-maf-housing-conversion-kit\"\u003eMAF Housing Conversion Kit\u003c\/a\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eCustomers can convert to a Short Ram Intake with our\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"https:\/\/prlmotorsports.myshopify.com\/collections\/intake\/products\/2016-honda-civic-1-5t-cold-air-intake-to-short-ram-conversion-kit\"\u003eShort Ram Intake Conversion Kit\u003c\/a\u003e\n\u003c\/h2\u003e\n\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003ePerformance Gains:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003e20 horsepower and 15 ft\/lb torque gains in comparison to stock with Big Bore MAF housing WITH Big Bore MAF basemap calibration on Hondata and\/or KTuner –\u003cspan\u003e \u003c\/span\u003e\u003ca href=\"http:\/\/prlarmy.com\/Blog\/2016-civic-street-race-maf-housing-dyno-comparison\/\"\u003eRead More Here\u003c\/a\u003e!\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eLarger gains to be seen at higher power levels with custom tuning\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch2\u003eThird Party Testing:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003ca href=\"http:\/\/prlarmy.com\/Blog\/hondata-tests-prl-intake-performance-gains-cobra\/\"\u003eHondata\u003c\/a\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e\u003ca href=\"http:\/\/prlarmy.com\/Blog\/innovative-motorworks-1-5t-intake-testing\/\"\u003eInnovative MotorWorks\u003c\/a\u003e\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e\n\u003ch2\u003eKit Includes:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch2\u003eBillet Aluminum MAF Housing (Anodized Black)\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003ePRL Motorsports High Flow Oiled Cone Air Filter\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e(1) 4-Ply Upper Silicone Intake Hose (Big Bore or Standard Bore)\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e(1) 6-Ply Lower Silicone Intake Hose\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eHDPE Rotomolded Lower Intake Tube\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003e(4) 304 Stainless Steel Worm Clamps\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eStainless Steel Mounting Brackets\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ch2\u003eStainless Steel Hardware\u003c\/h2\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cem\u003eSILICONE IS ONLY AVAILABLE IN BLACK – UPPER HOSE IS DIFFERENT THAN OUR “STAGE 1” SILICONE\u003c\/em\u003e\u003c\/h2\u003e\n\u003ch2\u003e\n\u003ca href=\"https:\/\/s280.photobucket.com\/user\/prlspencer\/media\/Civic%20x%20L.trim%20stock%20intake%20and%20stock%20tune_zpsf1d7zfq3.jpg.html\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20L.trim%20stock%20intake%20and%20stock%20tune_zpsf1d7zfq3.jpg\" border=\"0\" alt=\"photo Civic x L.trim stock intake and stock tune_zpsf1d7zfq3.jpg\"\u003e\u003c\/a\u003e\u003cbr\u003eAbove is a graph of the long term fuel trims with the stock intake w\/ air box and factory ECU mapping, or in other words a bone-stock car.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20L.trim%20PRL%20intake%20and%20stock%20tune_zpscgiprogu.jpg\" border=\"0\" alt=\"photo Civic x L.trim PRL intake and stock tune_zpscgiprogu.jpg\"\u003e\u003cbr\u003eHere is a graph of the long term fuel trims again with, but with our cold air intake (Standard Bore MAF) and factory ECU mapping.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20L.trim%20PRL%20intake%20and%20Hondata%206psi%20tune_zpssf6dz8bb.jpg\" border=\"0\" alt=\"photo Civic x L.trim PRL intake and Hondata 6psi tune_zpssf6dz8bb.jpg\"\u003e\u003cbr\u003eThis is another long term fuel trim graph, but with our cold air intake (Standard Bore MAF) and +6psi Hondata off-the-shelf map.\u003cbr\u003e\u003cbr\u003eNotice how consistent and similar all of the LTFT graphs are. Each graph is within -4 LTFT.\u003cbr\u003e\u003cbr\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20S.trim%20stock%20intake%20and%20stock%20tune_zpsmifcsitc.jpg\" border=\"0\" alt=\"photo Civic x S.trim stock intake and stock tune_zpsmifcsitc.jpg\"\u003e\u003cbr\u003eAbove is a graph of the short term fuel trims with stock intake w\/ air box and factory ECU mapping (stock car).\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/s280.photobucket.com\/user\/prlspencer\/media\/Civic%20x%20S.trim%20PRL%20intake%20and%20stock%20tune_zpssc3rykye.jpg.html\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20S.trim%20PRL%20intake%20and%20stock%20tune_zpssc3rykye.jpg\" border=\"0\" alt=\"photo Civic x S.trim PRL intake and stock tune_zpssc3rykye.jpg\"\u003e\u003c\/a\u003e \u003cbr\u003eHere is a short term fuel trim graph with our cold air intake (Standard Bore MAF) and factory ECU mapping.\u003cbr\u003e\u003cbr\u003e\u003ca href=\"https:\/\/s280.photobucket.com\/user\/prlspencer\/media\/Civic%20x%20S.trim%20PRL%20intake%20and%20Hondata%206psi%20tune_zpsumoiyfjm.jpg.html\" target=\"_blank\"\u003e\u003cimg src=\"https:\/\/i280.photobucket.com\/albums\/kk200\/prlspencer\/Civic%20x%20S.trim%20PRL%20intake%20and%20Hondata%206psi%20tune_zpsumoiyfjm.jpg\" border=\"0\" alt=\"photo Civic x S.trim PRL intake and Hondata 6psi tune_zpsumoiyfjm.jpg\"\u003e\u003c\/a\u003e\u003cbr\u003eThis is another graph of the short term fuel trims with our cold air intake (Standard Bore MAF) and +6psi Hondata off-the-shelf map.\u003cbr\u003e\u003cbr\u003eAll of the STFT graphs display identical curves and consistency.\u003cbr\u003e\u003cbr\u003e\n\u003c\/h2\u003e\n\u003ch1\u003e\u003cstrong\u003eWARRANTY:\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/10secondracing.com\/pages\/prl-motorsports%C2%AE-product-warranty\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0030\/5315\/8515\/files\/PRL_LOGO.webp?v=1762919617\" alt=\"\"\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"PRL Motorsports®","offers":[{"title":"Default Title","offer_id":42256517693534,"sku":"PRL-HC10-INT-CAI-D","price":318.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0030\/5315\/8515\/files\/Screenshot2025-12-08at1.16.59PM.png?v=1765228717","url":"https:\/\/10secondracing.com\/en-gb\/products\/prl-motorsports%c2%ae-16-21-honda-civic-si-1-5l-big-bore-cobra-cold-air-intake-system","provider":"10 Second Racing","version":"1.0","type":"link"}