304 stainless steel u-bends u-bends o d surcharge may apply 304 stainless 16 gage 065 part number legs wt lbs each 3/4 1 1 1/4 1 3/8 1 1/2 1 1/2 1 5/8 1 5/8 1 3/4 1 3/4 1 3/4 1 7/8 1 7/8 1 7/8 2 2 2 2 1/8 2 1/8 2 1/8 2 1/4 2 1/2 2 3/4 3 3 1/2 4 o d ub-075-20-16-304 ub-100-25-16-304 ub-125-20-16-304 ub-138-25-16-304 ub-150-25-16-304 ub-150-40-16-304 ub-163-25-16-304 ub-163-40-16-304 ub-175-25-16-304 ub-175-30-16-304 ub-175-40-16-304 ub-188-30-16-304 ub-188-40-16-304 ub-188-60-16-304 ub-200-30-16-304 ub-200-40-16-304 ub-200-60-16-304 ub-213-30-16-304 ub-213-40-16-304 ub-213-60-16-304 ub-225-40-16-304 ub-250-40-16-304 ub-275-40-16-304 ub-300-45-16-304 ub-350-45-16-304 ub-400-60-16-304 part number 6 6 6 6 6 6 6 6 6 6 6 6 6 5.5 6 6 5.5 6 6 5.5 6 6 6 6 6 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 5.5 x 6 x 6 x 5.5 x 6 x 6 x 5.5 x 6 x 6 x 6 x 6 x 6 x 9 0.72 1.07 1.25 1.50 1.65 1.99 1.79 2.17 1.94 2.09 2.34 2.24 2.57 3.13 2.40 2.75 3.34 2.55 2.93 3.56 3.11 3.46 3.82 4.44 5.19 7.
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321 stainless steel u-bends l-bends surcharge may apply 3 2 1 stainless exhibits superior resistance to fatigue and cracking at elevated temperatures compared to 304 and is highly recommended for turbo and super-charged applications 321 is frequently the material of choice of nextel cup and pro stock fabricators because it can be used more effectively in thinner gages than 304 reducing the weight of a set of headers by 25 or more u-bends o d part number 321 stainless 16 gage 065 legs wt lbs each 1 1 1 1 1 1 1 1 2 2 2 2 2 1/2 5/8 3/4 3/4 3/4 7/8 7/8 7/8 1/4 1/2 ub-150-25-16-321 ub-163-25-16-321 ub-175-25-16-321 ub-175-30-16-321 ub-175-40-16-321 ub-188-30-16-321 ub-188-40-16-321 ub-188-60-16-321 ub-200-30-16-321 ub-200-40-16-321 ub-200-60-16-321 ub-225-40-16-321 ub-250-40-16-321 6 6 6 6 6 6 6 5.5 6 6 5.5 6 6 xxxxxxxxxxxxx 6 6 6 6 6 6 6 5.5 6 6 5.5 6 6 1.65 1.80 1.94 2.09 2.40 2.24 2.57 3.13 2.40 2.75 3.34 3.11 3.46 49.17 65.92 48.82 51.84 54.98 69.73 75.54 92.98 67.87 73.37
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ultralight stainless motorsports mufflers burns stainless ultralight stainless race mufflers offer the greatest value in a race muffler available to the motorsports community remarkably light-weight l extremely durable l built to the highest quality standards l 100 stainless construction l completely tig welded l easily replaceable aerospace muffling cartridge l inside diameters from 2 all the way to 5 l can be built to custom length call for quote l optional stainless scrubble packing available call for quote if you need the highest performance and the lightest weight race muffler you can get at a price you can afford here it is l surcharge may apply sm-350-450-17 ultralight stainless mufflers inlet dia sm-300-450-12 with optional 3-bolt flange part number case dia length wt lbs each sm-400-550-9 2 2 2 2 2 3 3 3 3 3 3 4 4 4 4 4 4 4 5 5 5 5 1/4 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 sm-200-450-14 sm-225-450-14 sm-250-350-12 sm-250-350-17 sm-250-450-17 sm-300-450-12 sm-300-450-17 sm-300-
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flat-band clamps silicone hose hump hose and reducers flat-band clamps t-bolt t-bolt flat-band clamps are an alternative to u-bolt muffler clamps for clamping close tolerance slip connections on tubing flat-band clamps do not permanently crimp the slit tubing allowing easier removal after assembly stainless steel strap plated steel t-bolt and nut see page 23 for v-band clamps flat-band clamps size part number min dia surcharge may apply 304 stainless max dia silicone hose size each 1 2 2 2 2 3 3 3 3 4 4 3/4 1/4 1/2 3/4 1/4 1/2 3/4 1/2 fb-175 fb-200 fb-225 fb-250 fb-275 fb-300 fb-325 fb-350 fb-375 fb-400 fb-450 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.31 2.00 2.25 2.56 2.81 3.00 3.31 3.56 3.81 4.06 4.31 4.62 sh-150 sh-175 sh-200 sh-225 sh-250 sh-275 sh-300 sh-325 sh-350 sh-375 sh-400 9.49 9.49 9.49 9.49 9.49 9.49 9.49 9.49 9.49 10.49 10.49 silicone hose hump hose and reducers silicone high perf 4 ply l 4 ply silicone coolant hose reinforced with polyester fabric
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turbo inlet downpipe and wastegate flanges and 3-bolt flanges t3 and t4 turbo inlet flanges cnc machined 304 stainless turbo inlet flanges type 304 stainless part number id height id width a b bolt center width c bolt center height d tang flange port width e thickness each t25 t03 t04 t04 divided 1.88 t04 divided 2.00 t100 88-106mm t25rect304 t3f-rect-304 t4f-rect-304 t4t-188-304 t4t-200-304 t100-rect-304 1.50 1.94 1.94 2.06 2.15 2.45 2.00 2.31 2.94 n/a n/a 3.65 2.85 3.40 3.25 3.25 3.25 4.45 1.58 1.75 2.75 2.75 2.75 2.75 n/a n/a n/a 1.45 1.52 n/a 3/8 3/8 1/2 1/2 1/2 1/2 45.73 43.55 55.02 68.25 68.25 70.40 downpipe flanges type 304 stainless part number bolt center height a bolt circle b tube diameter c thickness each hks 100 mm 3 t04 rnd 2.75 t04 rnd 3 dpf-hks-300-304 dpf-t4-275-304 dpf-t4-300-304 2.78 3.04 3.04 3.92 4.30 4.30 3 2.75 3 1/2 1/2 1/2 60.29 76.57 76.57 wastegate flanges type 304 stainless part number bolt center width a tube diameter b thickness e
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racing merge collectors general information surcharge may apply burnsstainlessmergecollectors are in widespread use by top engine builders in nhra pro stock car bike and most other classes and are very popular in nascar alms fia-gt trans-am and irl fabricated from pre-bent tubing to form a pyramid inside burns stainless merge collectors combine high flow and high velocity to increase and broaden an engine s torque curve all the way to the horsepower peak and beyond they feature the highest quality fabrication and welding and each one is completely hand finished inside for proper flow for drag racing and similar applications where a tailpipe is not required megaphones fitted with reverse cones are invariably the best option they make the most horsepower maintain the highest and smoothest torque curve and on well developed engine combinations with optimally short header tube lengths and a well chosen collector outlet diameter offer the highest potential power past the peak without sacri
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surcharge may apply double-slip turbo collectors and splayed collector options 4-into-1 double-slip collectors inlet size part number each double slipturbocollectors achieve a tight weld-free seal at the header-collector junction by providing exterior slip tubes which are welded to your existing header tubes the slip tubes provide an extra seat and sealing surface for the collector and allow the header system to grow and shrink over a wide temperature range while greatly reducing the potential stress and cracking which is typical of welded stainless turbo headers both the collector and the header tubes in this system are spaced 1/8 farther apart to accommodate the additional slip tubes weld the slips to your existing header tubes using the collector as a jig 321 stainless is the standard material for our double-slip turbo collectors t3 t4 and v-band flanges are in stock we can usually fabricate a collector for your particular inlet flange in addition to our standard high-velocity 15º
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reference tables properties of metals used in motorsports applications material property t ensile strength yield strength elongation density modulus of elasticity coefficient of thermal expansion coefficient of thermal conductivity units lb/in2 70 f lb/in2 70 f percent lb/in3 x 106 lb/in2 in/in-f x 10-6 70 f btu/ft-hr-f 70f aluminum 6061 0 condition 18,000 8,000 25 0.098 10 13.1 104.00 aluminum 6061-t6 mild steel 1010 crew 55,000 40,000 20 0.283 29.5 7.228 26.98 304 stainless annealed astm a269 321 stainless annealed 90,000 35,000 55 0.290 28 9.6 9.30 titanium cp2 grade 2 astm b 338 inconel 625 45,000 40,000 12 0.098 10 13.1 96.50 85,000 35,000 55 0.290 28 9.9 9.40 50,000 40,000 20 0.163 15 4.8 12.00 140,000 77,000 47 0.305 30 5.5 5.65 welding rod compatibility table x not recommended aluminum aluminum 53561 or 40432 mild steel mild steel x 304 ss x 309 321 ss x 309 308 347 titanium cp-2 titanium cp-2 xxxx cp grade 2 inconel 625 inconel 625 x 625 625 625 x 625 304 ss 308 321 ss n
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when constructing racing headers technique if a hole is created in the tube while tacking then the joint must be broken apart and reground or replaced after the first tack is successfully completed rotate the tube 180° for the second tack the two tube segments may have spread apart following the first tack it is vitally important to hold the tubes tightly together when making the second tack if the gap will not close then the pieces probably were not flat to begin with it is best to break it apart touch up and start again this can be tricky so be patient and give yourself plenty of practice time it also helps to be rested two opposing tacks will do the job until the entire header is tacked two are preferably so the tube can be broken apart easily if a change is necessary after the final changes are made go back and add two more tacks to each joint for a total of 4 tacks at 90° intervals approx it is recommended to use a freshly ground electrode use the belt sander for this with a long
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aluminum aluminumiswidelyusedinracing to make anything from radiators to pistons to intake manifolds however we would never recommend aluminum for exhaust systems the properties of aluminum that make it so attractive to racers include light weight strength fabricability and corrosion resistance aluminum is approximately 1/3 the weight of steel yet some aluminum alloys exhibit tensile strengths greater than some low carbon steels many alloys can be heat treated to improve strength properties aluminum is available in many wrought forms such as tubing extruded shapes sheet and bar aluminum can also be cast using a variety of foundry methods using moderate strength heat treatable alloys forging can also be used to form aluminum this material can be fastened with rivets bolts or welding welded fabrications can also be heat treated there is a variety of wrought and cast alloys available for use by the racing fabricator adding alloying elements to enhance the physical properties of aluminum
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