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Message: <blockquote data-quote="CC&#039;S95GT" data-source="post: 1131506" data-attributes="member: 10547">You will need a small piece of 2" foam board, and an assortment of hole saws (not the spade bit kind).Now find out the tail pipe size and TB size. and get the matching holesaw bit. Note: the holesaw sizing is OD so you'll need to measure the ID of the bit. <img src="http://i997.photobucket.com/albums/af92/cecox7/Exhaust%20plugs/20130315_212010.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Do this for both tips and the throttle body.  Get as close as you can. If the plug is to loose then snug it up with some duct tape or masking tape.I chose to make 1 for the TB because there's a chance both vlvs. on 1 cylinder might be open at the same time.<img src="http://i997.photobucket.com/albums/af92/cecox7/Exhaust%20plugs/20130315_211545.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Now find out what the OD is of your shop vac hose and put a hole in 1 of your tail pipe plugs.<img src="http://i997.photobucket.com/albums/af92/cecox7/Exhaust%20plugs/20130315_211600.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Now get your car on jack stands and insert all plugs including shop vac on BLOW.<img src="http://i997.photobucket.com/albums/af92/cecox7/Exhaust%20plugs/20130315_211742.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i997.photobucket.com/albums/af92/cecox7/Exhaust%20plugs/20130315_211700.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Now you can take your time and run your hand over the whole length of the exhaust. You'll be able to hear the air hissing out. Usually the leak can be fixed just by repositioning the clamp.</blockquote>