Only on Race cars. tti's, nor dougs, will be anywhere near a race car of mine. The dyno results have proven that to me 3+ times now.
I don't recall having to notch my Lakewood shield with my tti's. Maybe it was already done as I got it second hand. :cheers:
Hopefully, you won't have the nightmare I had with both brands of headers and z-bar. tti's were worse than dougs to work around. Nothing like getting the down leg to swing in a narrowing triangle... it's a joy.