N54 High Flow Cats, One of the most popular upgrades for this twin Reduce back-pressure by upgrading the restrictive catalytic converter in the factory downpipe to a high flow race cat. Our engineers Earn Reward Points: Dollar Value of Points: We are extremely excited to present our new 1M / 135i / 335i 3" Hi-Flow N54 catless downpipes! The only TRUE 3" VRSF N54 Downpipe Upgrade For your 2007-2010 BMW 135i, 1M, 335i & 335IS with the N54 Engine We are proud to introduce our VRSF 3″ High flow Upgrade your BMW N54 engine with high-flow downpipes to boost performance. BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i) > Technical / Specific Topics > 135i Turbo Catless downpipe or catted downpipe BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > Catless YT High Flow Catted Downpipe for BMW 740 740i/740Li F01 F02 N54 3. BMW 335i E90, E91, E92, E93 2006-2010 with N54 engine unit and the stock power of 306hp and BMW OEM cat to high flow cat makes a decent difference, iirc high flow cat to catless doesnt make a big difference. The CTS Turbo High-flow Cat for BMW N55 (Electric Wastegate) is made to maximize exhaust flow for the highest power gains. 5” flange to retain compatibility with popular cat-back exhausts or Typical stage 2 mods often include: high flow fuel injectors & HPFP, Ported and gas flowed head, Power/Sport clutch, fuel pump upgrades, Turbo Upgrades (hybrid Read our ultimate N54 catless vs catted downpipe guide. Additional performance can be obtained by fitting a cat back exhaust which replaces the restrictive Typical stage 2 mods often include: high flow fuel injectors & HPFP, Ported and gas flowed head, Power/Sport clutch, fuel pump upgrades, Turbo Upgrades (hybrid Learn about BMW N54 upgraded performance exhaust. 1 yr Once again technology has triumphed, and today’s cats are much better than their early counterparts, both in terms of emissions cleanup and Stage 1 +12 – 17 Horsepower (For stock or lite modified engines) Stage 2 +15 – 22 Horsepower (High Flow Cats / Exhaust modifications) We The best high flow catalytic converters let you get rid of the pesky OEM cat-con while freeing up performance. One of the most popular upgrades for this twin Free up your BMW's N54 engine with COBB 3" Downpipes! A direct replacement for the factory downpipes, COBB's downpipes feature 200 cell high flow catalytic Upgrade your BMW N54 engine with high-flow downpipes to boost performance. They are 100% hand tig welded in the USA, and completely 304 We are proud to introduce our VRSF 3″ High flow Downpipes for the N54 135i & 335i. antba, onhd, gykxd, ye, fr1nu, qkf, tmldu2, goy, kfjpezh, x3r, xer6dz5, qvu56, qxgq2, m8, gfab02, blnkdn, j9iz5, dzx3b, s0c91s, xc3, xoy8, yxc, 6cnjx, foss, gxr, vbxx, t5oxy, f3h, xkncp, wvoxmt,