http://www.jegs.com/i/Dynomax/289/33226/10002/-1
http://www.summitracing.com/parts/SUP-0 ... /?rtype=10
http://www.jegs.com/i/JEGS/555/30732/10002/-1
http://www.donaldson.com/en/exhaust/sup ... 057171.pdf
http://www.verociousmotorsports.com/Sho ... aust-Clamp
these clamps are frequently MIS-used the connected pipes are rarely supposed to butt end to end and actually form the gas sealing surface over the exhaust flow
the pipes are supposed to be a male/female slip fit with the clamp forcing the outer pipe to form a high friction fit with the inner pipe as the clamp tends to slightly reduce the outer pipes inner clearance, effectively clamping the outer female pipe around the inner male pipe surface
cutting a short slot in the outer female pipe tends to aid clamp force.
occasionally the clamps are used to connect two similar size pipes, that are not a true slip fit, and they can be used that way but they tend to leak over time when used that way.
keep in mind clamps are used where the pipes must be able to be dis-assembled at times, its much better to weld any connection that's not located where occasional dis-assembly is mandatory
Accuseal Clamps
Accuseal 100% stainless steel exhaust clamps are a simple, effective way to connect exhaust system components (pipes, mufflers and converters). Unique seal and high clamp loads are provided without permanent distortion to exhaust members. Exhaust connections are serviceable and easy to disassemble.
Accuseal clamps are available in standard industry sizes ranging from 1-3/4'' (44.5mm) through 6'' (152.4mm). Unitized construction reduces part number complexity, and efficient use of materials reduces weight, and assembly costs.
Accuseal's unique fastening system stretches the band using its tensile strength permitting the use of thinner gauge, corrosive resistant materials. The reaction block provides a full 360 degree equal distribution of stretching force, prohibiting pipe distortion while completing a seal around the joined exhaust components.
AccuSeal Clamps are designed to be used on ID/OD style connections. For example, if you have a 2.50" exhaust, the clamp is designed to fit over tubing that has been flared to a 2.50" ID, or over an exhaust component such as a muffler that has a 2.5" ID inlet or outlet. For optimal sealing, the larger side of the connection (the ID side) should have relief cuts/slots in it.
look closely at the strait end of these tail pipe extensions youll see the connecting end is flared to form a receiving end for a slip fit, of the standard diam. male pipe end it will be attached too.
http://www.grainger.com/Grainger/WESTWA ... Pid=search
If your exhaust pipes not factory swagged to form a female end an expander tool can form the correct diam
http://www.grainger.com/Grainger/WESTWA ... Pid=search
if you need to cut exhaust to length this tool works in the often very restricted areas, under a car