I would not notch a subframe and then not box it back in. I'll go to my storage this week and post a pic of my subframe - but I'd much rather have a traction bar - it's more space than a notch and of course you can tune the launch and wheel-hop. A properly boxed in frame is as strong or stronger than OEM (trust me - I come from mini-trucking where notches/airride/hydros was my life before I moved into SpoCom.
They are a spinoff of a very popular design by RMF (Randy Monroe). They work - PERIOD. And they are affordable. I've always had serious headers - and 10 years ago this kind of performance was $800 and 3 weeks to a month of waiting.






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