Ford Falcon XD Pacemaker Headers & Twin 2 1/2" Exhaust System [Bimodal] Custom Made

Custom Exhaust Headers & Exhaust Systems
Since 1983

Project: Ford Falcon XD
351 Cleveland approx 350hp

Twin 2 1/2" Exhaust System
Stainless Steel X-Pipe
Magnaflow Mufflers
Bimodal Sound-Flow Control
Twin Tailpipes 2 1/4" Stainless Steel

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This cars is using pacemaker headers [PH4070], from the headers back the x-pipe is made from 304 stainless steel, machined in store to ensure the correct length and width.

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This exhaust is bimodal, it can be turned on / off. With the engine running and the valve switch in the "on" position the engine vaccuum will close the valve, the twin exhaust is now a single exhaust. The exhaust gasses from the left divert into the right exhaust pipe via the x-pipe, best part is when you step on the gas the engine looses vaccuum, & the valve automatically opens so the exhaust changes back into a twin system to allow the extra flow, when you back off throttle the vaccuum returns which then closes the valve changing the exhaust back to single.

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The valve used is by default in the "open position"

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When vacuum is applied the valve will be closed

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The valve needs to be positioned close to the muffler to allow enough room to fit in the floor recess

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The muffler hangers used are from an XY-XW-XA Falcon they bolt straight the floor of the xd with no modifications. From the mufflers back the twin 2 1/4" tailpipes are made from 409 stainless steel

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Ive had this setup on my own XD for over 15 yrs, initially i used rubber vaccum hose but found the responce time was slow so i changed to 1 1/8" bundy tube, now the responce time is almost instant. The bundy tube fits into the original clips which are already fitted to the car

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This piece of bundy tube continues to the gearbox curves up & enters the car near the gear shifter [C4 auto] and runs underneath the console then connects to the switch with a short piece vacuum hose to the switch. Another piece of bundy tube runs from the engine bay down the left side firewall down to the same point as the first piece then again vacuum hose to the switch The less vaccuum hose used the faster the responce rate of the valve.

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The control to turn the vaccuum on & off is an original vent switch from xd-xe falcon

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The pipe from the the left muffler over the top of the diff is flanged joined for easy removal

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The original rear tailpipe hanger was replaced with new design hanger which bolts to the factory mounting point. The new hanger is fully adjustable, left, right, up, down. Once positioned the new hanger allows no left or right movement but allows for the growth in the exhaust system when hot [exhausts systems get longer when hot]

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To remove the tailpipes, unbolt at the mufflers and the join connecting the left overaxle pipe, pull tailpipes foward slighly [around 20mm]

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Chrome tips can be added if required

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Twin exhaust systems are now available for XD Falcons [made to order] Pacemaker headers are also available to suit differant engine combinations.
Contact Us for details

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If you want to make you own exhaust system all parts used to build this exhaust system are available in our
Online Exhaust Shop.

Now availble for
XD Falcons [made to order] Contact Us for details

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