When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Speed engineering true duals hanging too low! Help
I installed the true dual rear exit kit from speed engineering and bolted everything up tight and started the car and everything seemed fine, took it around my block that is a little bumpy and it made a few banging noises came back and looked under the car and in the mid section of the car where the x pipe is it is sitting about an inch away from the floor any ideas as to why? Thanks
You used the stock hardware, and didn't tighten the clamps on your pipes coming off the headers enough. I can tell from looking at your clamps, they are nowhere near as tight as they need to be, that center portion should have no gaps and instead you have large spaces in-between. This in turn lets the x hang low and flex while you drive over bumps. See the thread, replace the hardware with grade 8 FULLY THREADED, push the pipes up and hold with jackstands when they are in the proper positions, and tighten the almighty hell out of the clamps. Now if your car is lowered than sorry not much you can do about that. Also if you opted to not do motor mounts when you did your header install odds are your worn out mounts are letting your pipes flex and is the cause of the banging noises. Here is mine on stock height with the SE TD's.
Last edited by usnfenix; Mar 27, 2017 at 04:29 PM.
I did exactly what you just stated, grade 8 hardware jack the pipes up and tighten everything down. I'm going to put in some poly motor mounts and see if that helps at all
I did exactly what you just stated, grade 8 hardware jack the pipes up and tighten everything down. I'm going to put in some poly motor mounts and see if that helps at all
I just edited my post because I left a key thing out, your clamps are not tight at all. Look at mine, look at yours, your clamps have a large gap in that center portion the bolt threads through, mine are flush. Did you swap to fully threaded bolts? I saw a guy on here who used only 3/4 threaded and thought he was getting it tight when really it was the nut running out of thread.
Those pictures were the first time I installed it, basically the day after I went to about every hardware store to find the correct bolts and once I got them I re tightened everything and I had jacks underneath the pipes and as I finished tightening i began to let down the jacks and everything dropped back down. Not 100% sure what else I should try. I appreciate all the input and ideas.
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.
7 Most Reliable High-Performance Engines GM Has Ever Built
Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Speed engineering true duals hanging too low! Help 
