After returning to a friends house from Christening my shiny new TSLs , i looked itnto my front wheel well to discover that my stock exhuast manifold was glowing. I wasnt running at very high RPMs and only was out for about 45 min. I have no exhuast whatsoever ( the pipes from each side connect under the drivers seat, thats it ) so i know there is very very little backpressure if any. Isthis unussual or telling me there is something wrong. I should also add i dont know if this is the first time this was just by chance i looked and noticed it so i dont know of this happening ne previous times. Thanks for any input.